diff --git a/openmetadata-integration-tests/src/test/java/org/openmetadata/it/tests/TypeResourceIT.java b/openmetadata-integration-tests/src/test/java/org/openmetadata/it/tests/TypeResourceIT.java
index 8e6629876fa4..44d131cd46bb 100644
--- a/openmetadata-integration-tests/src/test/java/org/openmetadata/it/tests/TypeResourceIT.java
+++ b/openmetadata-integration-tests/src/test/java/org/openmetadata/it/tests/TypeResourceIT.java
@@ -32,7 +32,9 @@
 import org.openmetadata.schema.type.CustomPropertyConfig;
 import org.openmetadata.schema.type.customProperties.EnumConfig;
 import org.openmetadata.sdk.client.OpenMetadataClient;
+import org.openmetadata.sdk.exceptions.InvalidRequestException;
 import org.openmetadata.sdk.network.HttpMethod;
+import org.openmetadata.sdk.network.RequestOptions;
 
 /**
  * Integration tests for Type entity operations.
@@ -324,6 +326,224 @@ void test_typeWithInvalidName_fails(TestNamespace ns) {
     }
   }
 
+  @Test
+  void test_customPropertyNameAllowedCharacters_succeeds(TestNamespace ns) throws Exception {
+    OpenMetadataClient client = SdkClients.adminClient();
+    UUID tableTypeId = TABLE_ENTITY_TYPE.getId();
+    String prefix = ns.prefix("safe");
+
+    String[] allowedNames = {
+      prefix + "Plain",
+      prefix + "_underscore",
+      prefix + "-hyphen",
+      prefix + ".dot",
+      prefix + "with space",
+      prefix + "with/slash",
+      prefix + "with%percent",
+      prefix + "with#hash",
+      prefix + "with@at",
+      prefix + "with!bang",
+      prefix + "with,comma",
+      prefix + "with;semi",
+      prefix + "with=eq",
+      prefix + "with|pipe",
+      prefix + "with'quote",
+      prefix + "with(lparen",
+      prefix + "with)rparen",
+      prefix + "with[lbrack",
+      prefix + "with]rbrack",
+      prefix + "with{lbrace",
+      prefix + "with}rbrace",
+      prefix + "with+plus",
+      prefix + "with?question",
+      prefix + "with~tilde",
+      prefix + "with`backtick",
+      prefix + "withMatched(pair)",
+      prefix + "withDigits123",
+    };
+
+    for (String name : allowedNames) {
+      CustomProperty property = new CustomProperty();
+      property.setName(name);
+      property.setDescription("Allowed-charset test for custom property name");
+      property.setPropertyType(STRING_TYPE.getEntityReference());
+
+      Type updatedType = addCustomProperty(client, tableTypeId, property);
+      assertNotNull(updatedType, "Allowed name '" + name + "' must be accepted");
+
+      boolean present =
+          updatedType.getCustomProperties().stream().anyMatch(cp -> name.equals(cp.getName()));
+      assertTrue(present, "Custom property '" + name + "' should be saved on the type");
+    }
+  }
+
+  @Test
+  void test_customPropertyNameDisallowedCharacters_fails(TestNamespace ns) {
+    OpenMetadataClient client = SdkClients.adminClient();
+    UUID tableTypeId = TABLE_ENTITY_TYPE.getId();
+    String prefix = ns.prefix("bad");
+
+    String[] disallowedNames = {
+      prefix + "with\"dquote",
+      prefix + "with:colon",
+      prefix + "with^caret",
+      prefix + "with$dollar",
+      prefix + "with\\backslash",
+      prefix + "with&amp",
+      prefix + "with<lt",
+      prefix + "with>gt",
+      prefix + "with*asterisk",
+    };
+
+    for (String name : disallowedNames) {
+      CustomProperty property = new CustomProperty();
+      property.setName(name);
+      property.setDescription("Disallowed-charset test for custom property name");
+      property.setPropertyType(STRING_TYPE.getEntityReference());
+
+      assertThrows(
+          InvalidRequestException.class,
+          () -> addCustomProperty(client, tableTypeId, property),
+          "Custom property name '" + name + "' should be rejected with HTTP 400");
+    }
+  }
+
+  @Test
+  void test_customPropertyNameMustStartWithAlphanumeric_fails(TestNamespace ns) {
+    OpenMetadataClient client = SdkClients.adminClient();
+    UUID tableTypeId = TABLE_ENTITY_TYPE.getId();
+    String prefix = ns.prefix("lead");
+
+    String[] invalidLeads = {
+      "_" + prefix, "-" + prefix, "." + prefix, " " + prefix, "(" + prefix,
+    };
+
+    for (String name : invalidLeads) {
+      CustomProperty property = new CustomProperty();
+      property.setName(name);
+      property.setDescription("Leading-character validation");
+      property.setPropertyType(STRING_TYPE.getEntityReference());
+
+      assertThrows(
+          InvalidRequestException.class,
+          () -> addCustomProperty(client, tableTypeId, property),
+          "Custom property name '" + name + "' must start with alphanumeric (HTTP 400 expected)");
+    }
+  }
+
+  @Test
+  void test_customPropertyNameTooLong_fails(TestNamespace ns) {
+    OpenMetadataClient client = SdkClients.adminClient();
+    UUID tableTypeId = TABLE_ENTITY_TYPE.getId();
+
+    StringBuilder longName = new StringBuilder(ns.prefix("long"));
+    while (longName.length() <= 256) {
+      longName.append('a');
+    }
+
+    CustomProperty property = new CustomProperty();
+    property.setName(longName.toString());
+    property.setDescription("Length validation");
+    property.setPropertyType(STRING_TYPE.getEntityReference());
+
+    assertThrows(
+        InvalidRequestException.class,
+        () -> addCustomProperty(client, tableTypeId, property),
+        "Custom property name longer than 256 characters should be rejected with HTTP 400");
+  }
+
+  @Test
+  void test_customPropertyNameUnbalancedBrackets_succeeds(TestNamespace ns) throws Exception {
+    OpenMetadataClient client = SdkClients.adminClient();
+    UUID tableTypeId = TABLE_ENTITY_TYPE.getId();
+    String prefix = ns.prefix("bracket");
+
+    String[] unbalancedNames = {
+      prefix + "openParen(",
+      prefix + "closeParen)",
+      prefix + "openLbrack[",
+      prefix + "closeRbrack]",
+      prefix + "openLbrace{",
+      prefix + "closeRbrace}",
+    };
+
+    for (String name : unbalancedNames) {
+      CustomProperty property = new CustomProperty();
+      property.setName(name);
+      property.setDescription("Unbalanced-bracket validation");
+      property.setPropertyType(STRING_TYPE.getEntityReference());
+
+      Type updatedType = addCustomProperty(client, tableTypeId, property);
+      assertNotNull(updatedType);
+
+      boolean present =
+          updatedType.getCustomProperties().stream().anyMatch(cp -> name.equals(cp.getName()));
+      assertTrue(present, "Unbalanced bracket name '" + name + "' should be saved");
+    }
+  }
+
+  @Test
+  void test_patchCannotAddCustomPropertyWithDisallowedName(TestNamespace ns) throws Exception {
+    OpenMetadataClient client = SdkClients.adminClient();
+    Type fresh = createEntityTypeForTest(client, ns, "patchBadType");
+
+    String badName = ns.prefix("patched:bad");
+    String patchJson =
+        String.format(
+            "[{\"op\":\"add\",\"path\":\"/customProperties\","
+                + "\"value\":[{\"name\":\"%s\",\"description\":\"probe\","
+                + "\"propertyType\":{\"id\":\"%s\",\"type\":\"type\",\"name\":\"string\"}}]}]",
+            badName, STRING_TYPE.getId());
+
+    assertThrows(
+        InvalidRequestException.class,
+        () ->
+            client
+                .getHttpClient()
+                .executeForString(
+                    HttpMethod.PATCH,
+                    "/v1/metadata/types/" + fresh.getId(),
+                    patchJson,
+                    RequestOptions.builder()
+                        .header("Content-Type", "application/json-patch+json")
+                        .build()),
+        "PATCH that adds a custom property with disallowed character must return 400");
+
+    Type after = getTypeById(client, fresh.getId(), "customProperties");
+    boolean persisted =
+        after.getCustomProperties() != null
+            && after.getCustomProperties().stream().anyMatch(cp -> badName.equals(cp.getName()));
+    assertFalse(persisted, "Bad-name custom property must not be persisted via PATCH");
+  }
+
+  @Test
+  void test_patchCanAddCustomPropertyWithValidName(TestNamespace ns) throws Exception {
+    OpenMetadataClient client = SdkClients.adminClient();
+    Type fresh = createEntityTypeForTest(client, ns, "patchGoodType");
+
+    String goodName = ns.prefix("patchedGood");
+    String patchJson =
+        String.format(
+            "[{\"op\":\"add\",\"path\":\"/customProperties\","
+                + "\"value\":[{\"name\":\"%s\",\"description\":\"probe\","
+                + "\"propertyType\":{\"id\":\"%s\",\"type\":\"type\",\"name\":\"string\"}}]}]",
+            goodName, STRING_TYPE.getId());
+
+    client
+        .getHttpClient()
+        .executeForString(
+            HttpMethod.PATCH,
+            "/v1/metadata/types/" + fresh.getId(),
+            patchJson,
+            RequestOptions.builder().header("Content-Type", "application/json-patch+json").build());
+
+    Type after = getTypeById(client, fresh.getId(), "customProperties");
+    boolean persisted =
+        after.getCustomProperties() != null
+            && after.getCustomProperties().stream().anyMatch(cp -> goodName.equals(cp.getName()));
+    assertTrue(persisted, "Valid-name custom property added via PATCH should be persisted");
+  }
+
   @Test
   void test_getEntityTypeFields() throws Exception {
     OpenMetadataClient client = SdkClients.adminClient();
@@ -770,6 +990,21 @@ private static Type createType(OpenMetadataClient client, CreateType createReque
         .execute(HttpMethod.POST, "/v1/metadata/types", createRequest, Type.class);
   }
 
+  /**
+   * Create a unique entity-category Type per test so PATCH-driven tests can mutate
+   * customProperties without racing against other tests on shared built-in types.
+   */
+  private static Type createEntityTypeForTest(
+      OpenMetadataClient client, TestNamespace ns, String label) throws Exception {
+    CreateType req = new CreateType();
+    req.setName(ns.prefix(label));
+    req.setCategory(Category.Entity);
+    req.setDescription("Per-test entity type for PATCH IT");
+    req.setNameSpace("data");
+    req.setSchema("{}");
+    return createType(client, req);
+  }
+
   private static Type getTypeById(OpenMetadataClient client, UUID typeId) throws Exception {
     String response =
         client
@@ -778,6 +1013,18 @@ private static Type getTypeById(OpenMetadataClient client, UUID typeId) throws E
     return OBJECT_MAPPER.readValue(response, Type.class);
   }
 
+  private static Type getTypeById(OpenMetadataClient client, UUID typeId, String fields)
+      throws Exception {
+    String response =
+        client
+            .getHttpClient()
+            .executeForString(
+                HttpMethod.GET,
+                "/v1/metadata/types/" + typeId.toString() + "?fields=" + fields,
+                null);
+    return OBJECT_MAPPER.readValue(response, Type.class);
+  }
+
   private static Type getTypeByName(OpenMetadataClient client, String name) throws Exception {
     String response =
         client
diff --git a/openmetadata-service/src/main/java/org/openmetadata/service/jdbi3/TypeRepository.java b/openmetadata-service/src/main/java/org/openmetadata/service/jdbi3/TypeRepository.java
index 469f2da1589b..efc114cfccc2 100644
--- a/openmetadata-service/src/main/java/org/openmetadata/service/jdbi3/TypeRepository.java
+++ b/openmetadata-service/src/main/java/org/openmetadata/service/jdbi3/TypeRepository.java
@@ -60,6 +60,7 @@
 import org.openmetadata.service.util.EntityUtil.Fields;
 import org.openmetadata.service.util.EntityUtil.RelationIncludes;
 import org.openmetadata.service.util.RestUtil.PutResponse;
+import org.openmetadata.service.util.ValidatorUtil;
 
 @Slf4j
 public class TypeRepository extends EntityRepository<Type> {
@@ -344,6 +345,13 @@ private void updateCustomProperties() {
       List<CustomProperty> deleted = new ArrayList<>();
       recordListChange(
           "customProperties", origProperties, updatedProperties, added, deleted, customFieldMatch);
+      // Legacy names from existing data are not re-validated; only newly added ones.
+      for (CustomProperty property : added) {
+        String violations = ValidatorUtil.validate(property);
+        if (violations != null) {
+          throw new IllegalArgumentException(violations);
+        }
+      }
       for (CustomProperty property : added) {
         storeCustomProperty(property);
       }
diff --git a/openmetadata-spec/src/main/resources/json/schema/type/basic.json b/openmetadata-spec/src/main/resources/json/schema/type/basic.json
index 37b6e0aa8f8f..21aaeea5d2ba 100644
--- a/openmetadata-spec/src/main/resources/json/schema/type/basic.json
+++ b/openmetadata-spec/src/main/resources/json/schema/type/basic.json
@@ -126,6 +126,13 @@
       "maxLength": 256,
       "pattern": "^((?!::).)*$"
     },
+    "customPropertyName": {
+      "description": "Name of a custom property. Allowed characters: alphanumeric, _ - . / % # @ ! , ; = | ' + ? ~ ` space ( ) [ ] { }. Must start with an alphanumeric character. Disallowed characters: \" * & < > : ^ $ \\",
+      "type": "string",
+      "minLength": 1,
+      "maxLength": 256,
+      "pattern": "^[A-Za-z0-9][A-Za-z0-9 _\\-.,;/%#@!'(){}\\[\\]|=+?~`]*$"
+    },
     "testCaseEntityName": {
       "description": "Name that identifies a test definition and test case.",
       "type": "string",
diff --git a/openmetadata-spec/src/main/resources/json/schema/type/customProperty.json b/openmetadata-spec/src/main/resources/json/schema/type/customProperty.json
index 052e25586cf6..b02fd6087504 100644
--- a/openmetadata-spec/src/main/resources/json/schema/type/customProperty.json
+++ b/openmetadata-spec/src/main/resources/json/schema/type/customProperty.json
@@ -49,8 +49,8 @@
   },
   "properties": {
     "name": {
-      "description": "Name of the entity property. Note a property name must be unique for an entity. Property name must follow camelCase naming adopted by openMetadata - must start with lower case with no space, underscore, or dots.",
-      "$ref": "../type/basic.json#/definitions/entityName"
+      "description": "Name of the entity property. Must be unique for an entity. Allowed characters: alphanumeric, _ - . / % # @ ! , ; = | ' + ? ~ ` space ( ) [ ] { }. Must start with an alphanumeric character. Disallowed: \" * & < > : ^ $ \\.",
+      "$ref": "../type/basic.json#/definitions/customPropertyName"
     },
     "displayName": {
       "description": "Display Name for the custom property.Must be unique for an entity.",
diff --git a/openmetadata-ui/src/main/resources/ui/playwright/constant/common.ts b/openmetadata-ui/src/main/resources/ui/playwright/constant/common.ts
index bd8d46d0fd67..b5dacf2595e4 100644
--- a/openmetadata-ui/src/main/resources/ui/playwright/constant/common.ts
+++ b/openmetadata-ui/src/main/resources/ui/playwright/constant/common.ts
@@ -31,6 +31,9 @@ export const NAME_MIN_MAX_LENGTH_VALIDATION_ERROR =
 export const NAME_MAX_LENGTH_VALIDATION_ERROR =
   'Name size must be between 1 and 128';
 
+export const CP_NAME_MAX_LENGTH_VALIDATION_ERROR =
+  'Name size must be between 1 and 256';
+
 export const DELETE_TERM = 'DELETE';
 
 export const COMMON_TIER_TAG = [
diff --git a/openmetadata-ui/src/main/resources/ui/playwright/constant/customProperty.ts b/openmetadata-ui/src/main/resources/ui/playwright/constant/customProperty.ts
index 88c7781b38de..7d5a97a08e43 100644
--- a/openmetadata-ui/src/main/resources/ui/playwright/constant/customProperty.ts
+++ b/openmetadata-ui/src/main/resources/ui/playwright/constant/customProperty.ts
@@ -212,5 +212,19 @@ export const CUSTOM_PROPERTIES_ENTITIES = {
   },
 };
 
-export const CUSTOM_PROPERTY_NAME_VALIDATION_ERROR =
-  "Name must not contain '::'.";
+export const CUSTOM_PROPERTY_NAME_VALIDATION_ERROR = String.raw`Name must start with a letter or number. Invalid characters: " * : ^ $ \ < > &`;
+
+export const CUSTOM_PROPERTY_INVALID_NAMES = {
+  STARTS_WITH_SPECIAL_CHAR: '_invalidName',
+  DISALLOWED_COLON: 'name:with:colon',
+  DISALLOWED_DOLLAR: 'name$invalid',
+  DISALLOWED_CARET: 'name^invalid',
+  DISALLOWED_QUOTE: 'name"invalid',
+  DISALLOWED_BACKSLASH: String.raw`name\invalid`,
+  DISALLOWED_LESS_THAN: 'name<<invalid',
+  DISALLOWED_GREATER_THAN: 'name>>invalid',
+  DISALLOWED_AMPERSAND: 'name&invalid',
+  DISALLOWED_ASTERISK: 'name*invalid',
+};
+
+export const NAME_SUFFIX = ".!@#%`()_-=+{}[]~|;',.?/";
diff --git a/openmetadata-ui/src/main/resources/ui/playwright/e2e/Pages/CustomProperties.spec.ts b/openmetadata-ui/src/main/resources/ui/playwright/e2e/Pages/CustomProperties.spec.ts
index 82cdfaebad5a..9d32a4b931ed 100644
--- a/openmetadata-ui/src/main/resources/ui/playwright/e2e/Pages/CustomProperties.spec.ts
+++ b/openmetadata-ui/src/main/resources/ui/playwright/e2e/Pages/CustomProperties.spec.ts
@@ -26,7 +26,16 @@
  */
 
 import { APIRequestContext, expect, test } from '@playwright/test';
-import { CUSTOM_PROPERTIES_ENTITIES } from '../../constant/customProperty';
+import {
+  CP_NAME_MAX_LENGTH_VALIDATION_ERROR,
+  INVALID_NAMES,
+} from '../../constant/common';
+import {
+  CUSTOM_PROPERTIES_ENTITIES,
+  CUSTOM_PROPERTY_INVALID_NAMES,
+  CUSTOM_PROPERTY_NAME_VALIDATION_ERROR,
+  NAME_SUFFIX,
+} from '../../constant/customProperty';
 import {
   CP_BASE_VALUES,
   CP_PARTIAL_SEARCH_VALUES,
@@ -267,11 +276,15 @@ ALL_ENTITIES.forEach(({ key, makeInstance }) => {
       createdCPData: [],
     };
     const propertyNames: Record<string, string> = {};
-    const dashboardSearchPropertyName = `cp-${uuid()}-${entity.name}`;
+    const dashboardSearchPropertyName = `cp-${uuid()}-${
+      entity.name
+    }${NAME_SUFFIX}`;
     const dashboardPropertyValue = `EXECUTIVE_DASHBOARD_${uuid()}`;
 
     // Pipeline-specific state
-    const pipelineSearchPropertyName = `cp-${uuid()}-${entity.name}`;
+    const pipelineSearchPropertyName = `cp-${uuid()}-${
+      entity.name
+    }${NAME_SUFFIX}`;
     const pipelinePropertyValue = `ETL_PRODUCTION_${uuid()}`;
 
     test.beforeAll(async ({ browser }) => {
@@ -352,7 +365,7 @@ ALL_ENTITIES.forEach(({ key, makeInstance }) => {
     BASIC_PROPERTIES.forEach((property) => {
       test(property, async ({ page }) => {
         test.slow();
-        const propertyName = `cp-${uuid()}-${entity.name}`;
+        const propertyName = `cp-${uuid()}-${entity.name}${NAME_SUFFIX}`;
 
         await settingClick(
           page,
@@ -387,7 +400,7 @@ ALL_ENTITIES.forEach(({ key, makeInstance }) => {
     CONFIG_PROPERTIES.forEach((propertyConfig) => {
       test(propertyConfig.name, async ({ page }) => {
         test.slow();
-        const propertyName = `cp-${uuid()}-${entity.name}`;
+        const propertyName = `cp-${uuid()}-${entity.name}${NAME_SUFFIX}`;
 
         await settingClick(
           page,
@@ -3528,3 +3541,162 @@ ALL_ENTITIES.forEach(({ key, makeInstance }) => {
     }
   });
 });
+
+test.describe('Custom property name validation', () => {
+  test.use({ storageState: 'playwright/.auth/admin.json' });
+
+  test.beforeEach(async ({ page }) => {
+    test.slow();
+    await redirectToHomePage(page);
+    await settingClick(page, GlobalSettingOptions.TABLES, true);
+    await page.click('[data-testid="add-field-button"]');
+  });
+
+  const nameInput = '[data-testid="name"] input';
+  const nameError = '#name_help';
+
+  test('should show error when name starts with a non-alphanumeric character', async ({
+    page,
+  }) => {
+    await page.fill(
+      nameInput,
+      CUSTOM_PROPERTY_INVALID_NAMES.STARTS_WITH_SPECIAL_CHAR
+    );
+
+    await expect(page.locator(nameError)).toContainText(
+      CUSTOM_PROPERTY_NAME_VALIDATION_ERROR
+    );
+  });
+
+  test('should show error when name contains a colon', async ({ page }) => {
+    await page.fill(nameInput, CUSTOM_PROPERTY_INVALID_NAMES.DISALLOWED_COLON);
+
+    await expect(page.locator(nameError)).toContainText(
+      CUSTOM_PROPERTY_NAME_VALIDATION_ERROR
+    );
+  });
+
+  test('should show error when name contains a dollar sign', async ({
+    page,
+  }) => {
+    await page.fill(nameInput, CUSTOM_PROPERTY_INVALID_NAMES.DISALLOWED_DOLLAR);
+
+    await expect(page.locator(nameError)).toContainText(
+      CUSTOM_PROPERTY_NAME_VALIDATION_ERROR
+    );
+  });
+
+  test('should show error when name contains a caret', async ({ page }) => {
+    await page.fill(nameInput, CUSTOM_PROPERTY_INVALID_NAMES.DISALLOWED_CARET);
+
+    await expect(page.locator(nameError)).toContainText(
+      CUSTOM_PROPERTY_NAME_VALIDATION_ERROR
+    );
+  });
+
+  test('should show error when name contains a double quote', async ({
+    page,
+  }) => {
+    await page.fill(nameInput, CUSTOM_PROPERTY_INVALID_NAMES.DISALLOWED_QUOTE);
+
+    await expect(page.locator(nameError)).toContainText(
+      CUSTOM_PROPERTY_NAME_VALIDATION_ERROR
+    );
+  });
+
+  test('should show error when name contains a backslash', async ({ page }) => {
+    await page.fill(
+      nameInput,
+      CUSTOM_PROPERTY_INVALID_NAMES.DISALLOWED_BACKSLASH
+    );
+
+    await expect(page.locator(nameError)).toContainText(
+      CUSTOM_PROPERTY_NAME_VALIDATION_ERROR
+    );
+  });
+
+  test('should show error when name contains a less-than sign', async ({
+    page,
+  }) => {
+    test.slow();
+    await page.fill(
+      nameInput,
+      CUSTOM_PROPERTY_INVALID_NAMES.DISALLOWED_LESS_THAN
+    );
+
+    await expect(page.locator(nameError)).toContainText(
+      CUSTOM_PROPERTY_NAME_VALIDATION_ERROR
+    );
+  });
+
+  test('should show error when name contains a greater-than sign', async ({
+    page,
+  }) => {
+    test.slow();
+    await page.fill(
+      nameInput,
+      CUSTOM_PROPERTY_INVALID_NAMES.DISALLOWED_GREATER_THAN
+    );
+
+    await expect(page.locator(nameError)).toContainText(
+      CUSTOM_PROPERTY_NAME_VALIDATION_ERROR
+    );
+  });
+
+  test('should show error when name contains an ampersand', async ({
+    page,
+  }) => {
+    test.slow();
+    await page.fill(
+      nameInput,
+      CUSTOM_PROPERTY_INVALID_NAMES.DISALLOWED_AMPERSAND
+    );
+
+    await expect(page.locator(nameError)).toContainText(
+      CUSTOM_PROPERTY_NAME_VALIDATION_ERROR
+    );
+  });
+
+  test('should show error when name contains an asterisk', async ({ page }) => {
+    test.slow();
+    await page.fill(
+      nameInput,
+      CUSTOM_PROPERTY_INVALID_NAMES.DISALLOWED_ASTERISK
+    );
+
+    await expect(page.locator(nameError)).toContainText(
+      CUSTOM_PROPERTY_NAME_VALIDATION_ERROR
+    );
+  });
+
+  test('should accept a valid name starting with a letter', async ({
+    page,
+  }) => {
+    await page.fill(nameInput, 'validName_123');
+
+    await expect(page.locator(nameError)).not.toBeVisible();
+  });
+
+  test('should accept a valid name with allowed special characters', async ({
+    page,
+  }) => {
+    test.slow();
+    await page.fill(nameInput, "valid Name.!@#%`()_-=+{}[]~|;',.?/");
+
+    await expect(page.locator(nameError)).not.toBeVisible();
+  });
+
+  test('should show error when name exceeds 256 characters', async ({
+    page,
+  }) => {
+    test.slow();
+    await page.fill(
+      nameInput,
+      `${INVALID_NAMES.MAX_LENGTH}${INVALID_NAMES.MAX_LENGTH}`
+    );
+
+    await expect(page.locator(nameError)).toContainText(
+      CP_NAME_MAX_LENGTH_VALIDATION_ERROR
+    );
+  });
+});
diff --git a/openmetadata-ui/src/main/resources/ui/playwright/utils/advancedSearch.ts b/openmetadata-ui/src/main/resources/ui/playwright/utils/advancedSearch.ts
index 021422169d1b..1496fbf66d18 100644
--- a/openmetadata-ui/src/main/resources/ui/playwright/utils/advancedSearch.ts
+++ b/openmetadata-ui/src/main/resources/ui/playwright/utils/advancedSearch.ts
@@ -210,12 +210,7 @@ export const selectOption = async (
   // Use .first() to handle multiple matches (acceptable when scoped to visible dropdown)
   const optionLocator = page
     .locator('.ant-select-dropdown:visible')
-    .locator('.ant-select-item-option')
-    .filter({
-      hasText: new RegExp(
-        `^${optionTitle.replaceAll(/[.*+?^${}()|[\]\\]/g, '\\$&')}$`
-      ),
-    })
+    .getByTitle(optionTitle, { exact: true })
     .first();
   await expect(optionLocator).toBeVisible();
 
diff --git a/openmetadata-ui/src/main/resources/ui/playwright/utils/customProperty.ts b/openmetadata-ui/src/main/resources/ui/playwright/utils/customProperty.ts
index c2e1040d6860..28d86710aa53 100644
--- a/openmetadata-ui/src/main/resources/ui/playwright/utils/customProperty.ts
+++ b/openmetadata-ui/src/main/resources/ui/playwright/utils/customProperty.ts
@@ -11,10 +11,11 @@
  *  limitations under the License.
  */
 import { APIRequestContext, expect, Page } from '@playwright/test';
-import { INVALID_NAMES } from '../constant/common';
 import {
+  CUSTOM_PROPERTY_INVALID_NAMES,
   CUSTOM_PROPERTY_NAME_VALIDATION_ERROR,
   ENTITY_REFERENCE_PROPERTIES,
+  NAME_SUFFIX,
 } from '../constant/customProperty';
 import { SidebarItem } from '../constant/sidebar';
 import {
@@ -530,7 +531,7 @@ export const createCustomPropertyForEntity = async (
   };
 
   for (const item of propertyList) {
-    const customPropertyName = `cp-${item.name}-${uuid()}`;
+    const customPropertyName = `cp-${item.name}-${uuid()}${NAME_SUFFIX}`;
     const payload = {
       name: customPropertyName,
       description: customPropertyName,
@@ -660,7 +661,7 @@ export const addCustomPropertiesForEntity = async ({
   // Validation check — only '::' is blocked
   await page.fill(
     '[data-testid="name"] input',
-    INVALID_NAMES.WITH_SPECIAL_CHARS
+    CUSTOM_PROPERTY_INVALID_NAMES.DISALLOWED_COLON
   );
 
   await expect(page.locator('#name_help')).toContainText(
@@ -772,12 +773,7 @@ export const addCustomPropertiesForEntity = async ({
 
   expect(response.status()).toBe(200);
   await expect(
-    page.getByRole('row', {
-      name: new RegExp(
-        propertyName.replaceAll(/[.*+?^${}()|[\]\\]/g, '\\$&'),
-        'i'
-      ),
-    })
+    page.locator('tr').filter({ hasText: propertyName })
   ).toBeVisible();
 };
 
diff --git a/openmetadata-ui/src/main/resources/ui/src/components/Settings/CustomProperty/AddCustomProperty/AddCustomProperty.tsx b/openmetadata-ui/src/main/resources/ui/src/components/Settings/CustomProperty/AddCustomProperty/AddCustomProperty.tsx
index 2a0385abf6c7..c8ea0a23cfe0 100644
--- a/openmetadata-ui/src/main/resources/ui/src/components/Settings/CustomProperty/AddCustomProperty/AddCustomProperty.tsx
+++ b/openmetadata-ui/src/main/resources/ui/src/components/Settings/CustomProperty/AddCustomProperty/AddCustomProperty.tsx
@@ -30,7 +30,7 @@ import {
   TABLE_TYPE_CUSTOM_PROPERTY,
 } from '../../../../constants/CustomProperty.constants';
 import { GlobalSettingsMenuCategory } from '../../../../constants/GlobalSettings.constants';
-import { ENTITY_NAME_REGEX } from '../../../../constants/regex.constants';
+import { CUSTOM_PROPERTY_NAME_REGEX } from '../../../../constants/regex.constants';
 import {
   CUSTOM_PROPERTY_CATEGORY,
   OPEN_METADATA,
@@ -270,7 +270,15 @@ const AddCustomProperty = ({
         placeholder: t('label.name'),
         rules: [
           {
-            pattern: ENTITY_NAME_REGEX,
+            max: 256,
+            message: t('message.entity-size-in-between', {
+              entity: t('label.name'),
+              min: 1,
+              max: 256,
+            }),
+          },
+          {
+            pattern: CUSTOM_PROPERTY_NAME_REGEX,
             message: t('message.custom-property-name-validation'),
           },
         ],
diff --git a/openmetadata-ui/src/main/resources/ui/src/constants/regex.constants.ts b/openmetadata-ui/src/main/resources/ui/src/constants/regex.constants.ts
index be9ee2e167f7..0b8bf5550a4a 100644
--- a/openmetadata-ui/src/main/resources/ui/src/constants/regex.constants.ts
+++ b/openmetadata-ui/src/main/resources/ui/src/constants/regex.constants.ts
@@ -22,6 +22,15 @@ export const EMAIL_REG_EX = /^\S+@\S+\.\S+$/;
  */
 export const ENTITY_NAME_REGEX = /^((?!::).)*$/;
 
+/**
+ * Custom property name validation:
+ * - Must start with an alphanumeric character
+ * - Allowed characters: alphanumeric, _ - . / % # @ ! , ; = | ' + ? ~ ` space ( ) [ ] { }
+ * - Disallowed: " * : ^ $ \ < > &
+ */
+export const CUSTOM_PROPERTY_NAME_REGEX =
+  /^[A-Za-z0-9][A-Za-z0-9 _\-.,;/%#@!'(){}[\]|=+?~`]*$/;
+
 /**
  * Matches any string that does NOT contain the following:
  * - Double colon (::)
diff --git a/openmetadata-ui/src/main/resources/ui/src/generated/entity/type.ts b/openmetadata-ui/src/main/resources/ui/src/generated/entity/type.ts
index 94f26411d9a7..2c7795c09d5f 100644
--- a/openmetadata-ui/src/main/resources/ui/src/generated/entity/type.ts
+++ b/openmetadata-ui/src/main/resources/ui/src/generated/entity/type.ts
@@ -175,9 +175,9 @@ export interface CustomProperty {
      */
     displayName?: string;
     /**
-     * Name of the entity property. Note a property name must be unique for an entity. Property
-     * name must follow camelCase naming adopted by openMetadata - must start with lower case
-     * with no space, underscore, or dots.
+     * Name of the entity property. Must be unique for an entity. Allowed characters:
+     * alphanumeric, _ - . / % # @ ! , ; = | ' + ? ~ ` space ( ) [ ] { }. Must start with an
+     * alphanumeric character. Disallowed: " * & < > : ^ $ \.
      */
     name:         string;
     propertyType: EntityReference;
diff --git a/openmetadata-ui/src/main/resources/ui/src/generated/type/customProperty.ts b/openmetadata-ui/src/main/resources/ui/src/generated/type/customProperty.ts
index 618ded1dac49..a8608cb0613f 100644
--- a/openmetadata-ui/src/main/resources/ui/src/generated/type/customProperty.ts
+++ b/openmetadata-ui/src/main/resources/ui/src/generated/type/customProperty.ts
@@ -21,9 +21,9 @@ export interface CustomProperty {
      */
     displayName?: string;
     /**
-     * Name of the entity property. Note a property name must be unique for an entity. Property
-     * name must follow camelCase naming adopted by openMetadata - must start with lower case
-     * with no space, underscore, or dots.
+     * Name of the entity property. Must be unique for an entity. Allowed characters:
+     * alphanumeric, _ - . / % # @ ! , ; = | ' + ? ~ ` space ( ) [ ] { }. Must start with an
+     * alphanumeric character. Disallowed: " * & < > : ^ $ \.
      */
     name:         string;
     propertyType: EntityReference;
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/ar-sa.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/ar-sa.json
index 5e30920532c2..7754ad6a8834 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/ar-sa.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/ar-sa.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "مسار رابط شعار شريط التنقل.",
     "custom-properties-description": "التقط بيانات وصفية مخصصة لإثراء أصول البيانات الخاصة بك عن طريق توسيع السمات.",
     "custom-property-is-set-to-message": "تم تعيين {{fieldName}} إلى",
-    "custom-property-name-validation": "يجب ألا يحتوي الاسم على '::'.",
+    "custom-property-name-validation": "يجب أن يبدأ الاسم بحرف أو رقم. أحرف غير صالحة: \" * : ^ $ \\ < > &",
     "custom-property-update": "تحديث الخاصية المخصصة '{{propertyName}}' في {{entityName}} هو {{status}}",
     "customize-brand-description": "قم بتخصيص تجربة مستخدم {{brandName}} لتناسب احتياجات مؤسستك وفريقك.",
     "customize-entity-landing-page-header-for-persona": "تخصيص تجربة صفحة كيان {{entity}} لشخصية <0>{{persona}}</0>",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/de-de.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/de-de.json
index 3216325bd896..2ea2e3c765f1 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/de-de.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/de-de.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "URL-Pfad für das Navbar-Logo.",
     "custom-properties-description": "Erfassen Sie benutzerdefinierte Metadaten, um Ihre Datenobjekte durch die Erweiterung der Attribute zu bereichern.",
     "custom-property-is-set-to-message": "{{fieldName}} ist gesetzt auf",
-    "custom-property-name-validation": "Der Name darf nicht '::' enthalten.",
+    "custom-property-name-validation": "Der Name muss mit einem Buchstaben oder einer Zahl beginnen. Ungültige Zeichen: \" * : ^ $ \\ < > &",
     "custom-property-update": "Aktualisierung der benutzerdefinierten Eigenschaft '{{propertyName}}' in {{entityName}} ist {{status}}",
     "customize-brand-description": "Passen Sie die {{brandName}}-Benutzeroberfläche an Ihre Organisations- und Teambedürfnisse an.",
     "customize-entity-landing-page-header-for-persona": "Personalisieren Sie die {{entity}}-Entitätsseite für die <0>{{persona}}</0>-Persona",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/en-us.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/en-us.json
index 412decf4af00..0c23c36b5252 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/en-us.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/en-us.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "URL path for the navbar logo.",
     "custom-properties-description": " Capture custom metadata to enrich your data assets by extending the attributes.",
     "custom-property-is-set-to-message": "{{fieldName}} is set to",
-    "custom-property-name-validation": "Name must not contain '::'.",
+    "custom-property-name-validation": "Name must start with a letter or number. Invalid characters: \" * : ^ $ \\ < > &",
     "custom-property-update": "Custom property '{{propertyName}}' update in {{entityName}} is {{status}}",
     "customize-brand-description": "Tailor the {{brandName}} UX to suit your organizational and team needs.",
     "customize-entity-landing-page-header-for-persona": "Personalize the {{entity}} Entity Page experience for the <0>{{persona}}</0> persona",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/es-es.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/es-es.json
index 75a6ff1d1809..ff8d10f8a7b0 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/es-es.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/es-es.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "Ruta URL para el logotipo de la barra de navegación.",
     "custom-properties-description": "Captura metadatos personalizados para enriquecer tus activos de datos mediante la extensión de los atributos.",
     "custom-property-is-set-to-message": "{{fieldName}} está configurada para",
-    "custom-property-name-validation": "El nombre no debe contener '::'.",
+    "custom-property-name-validation": "El nombre debe comenzar con una letra o número. Caracteres inválidos: \" * : ^ $ \\ < > &",
     "custom-property-update": "La actualización de la propiedad personalizada '{{propertyName}}' en {{entityName}} está {{status}}",
     "customize-brand-description": "Adapte la experiencia de usuario de {{brandName}} para satisfacer las necesidades de su organización y equipo.",
     "customize-entity-landing-page-header-for-persona": "Personaliza la experiencia de la Página de Entidad {{entity}} para la persona <0>{{persona}}</0>",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/fr-fr.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/fr-fr.json
index 6b3863af98f8..110139d1086e 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/fr-fr.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/fr-fr.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "Chemin (URL) du logo de la barre de navigation.",
     "custom-properties-description": " Capturer des métadonnées personnalisées pour enrichir vos actifs de données en étendant leurs attributs.",
     "custom-property-is-set-to-message": "{{fieldName}} est réglé sur",
-    "custom-property-name-validation": "Le nom ne doit pas contenir '::'.",
+    "custom-property-name-validation": "Le nom doit commencer par une lettre ou un chiffre. Caractères invalides : \" * : ^ $ \\ < > &",
     "custom-property-update": "La mise à jour de la propriété personnalisée '{{propertyName}}' dans {{entityName}} est {{status}}",
     "customize-brand-description": "Ajustez l'expérience utilisateur d'{{brandName}} pour répondre à vos besoins d'équipe et d'organisation.",
     "customize-entity-landing-page-header-for-persona": "Personnalisez l'expérience de la page d'entité {{entity}} pour la persona <0>{{persona}}</0>",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/gl-es.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/gl-es.json
index a886c032c103..11193c647357 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/gl-es.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/gl-es.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "Ruta URL para o logotipo da barra de navegación.",
     "custom-properties-description": "Captura metadatos personalizados para enriquecer os teus activos de datos estendendo os atributos.",
     "custom-property-is-set-to-message": "{{fieldName}} está configurado para",
-    "custom-property-name-validation": "O nome non debe conter '::'.",
+    "custom-property-name-validation": "O nome debe comezar por letra ou número. Caracteres inválidos: \" * : ^ $ \\ < > &",
     "custom-property-update": "A actualización da propiedade personalizada '{{propertyName}}' en {{entityName}} está {{status}}",
     "customize-brand-description": "Adapta a experiencia de usuario de {{brandName}} ás necesidades da túa organización e equipo.",
     "customize-entity-landing-page-header-for-persona": "Personaliza a experiencia da páxina de entidade {{entity}} para a persoa <0>{{persona}}</0>",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/he-he.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/he-he.json
index 5fff7d7f2f72..5245b039e4a0 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/he-he.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/he-he.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "נתיב URL עבור לוגו סרגל הניווט.",
     "custom-properties-description": " לכוד מטא-דאטה מותאמים אישית להעשרת נכסי הנתונים שלך על ידי הרחבת התכונות.",
     "custom-property-is-set-to-message": "{{fieldName}} מוגדר ל",
-    "custom-property-name-validation": "השם אינו יכול להכיל '::'.",
+    "custom-property-name-validation": "השם חייב להתחיל באות או במספר. תווים לא חוקיים: \" * : ^ $ \\ < > &",
     "custom-property-update": "עדכון המאפיין המותאם אישית '{{propertyName}}' ב{{entityName}} הוא {{status}}",
     "customize-brand-description": "התאם את חוויית המשתמש של {{brandName}} לצרכי הארגון והצוות שלך.",
     "customize-entity-landing-page-header-for-persona": "התאם אישית את חוויית דף הישות של {{entity}} עבור הפרסונה <0>{{persona}}</0>",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/ja-jp.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/ja-jp.json
index 6a9b6a20597b..89843082f9ba 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/ja-jp.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/ja-jp.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "ナビゲーションバーのロゴ用の URL パス",
     "custom-properties-description": "属性を拡張して、データアセットに独自のメタデータを追加できます。",
     "custom-property-is-set-to-message": "{{fieldName}} に設定されています",
-    "custom-property-name-validation": "名前に '::' を含めることはできません。",
+    "custom-property-name-validation": "名前は文字または数字で始まる必要があります。無効な文字: \" * : ^ $ \\ < > &",
     "custom-property-update": "カスタムプロパティ '{{propertyName}}' の {{entityName}} に対する更新は {{status}} です",
     "customize-brand-description": "{{brandName}} の UX を組織やチームのニーズに合わせて調整します。",
     "customize-entity-landing-page-header-for-persona": "{{entity}} エンティティページの体験を <0>{{persona}}</0> ペルソナ向けにパーソナライズします",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/ko-kr.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/ko-kr.json
index 4248bc8f0325..546f5c833628 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/ko-kr.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/ko-kr.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "내비게이션 바 로고의 URL 경로입니다.",
     "custom-properties-description": "속성을 확장하여 데이터 자산을 풍부하게 하는 사용자 정의 메타데이터를 캡처합니다.",
     "custom-property-is-set-to-message": "{{fieldName}}이(가) 다음으로 설정되었습니다",
-    "custom-property-name-validation": "이름에는 '::'가 포함되어서는 안 됩니다.",
+    "custom-property-name-validation": "이름은 문자나 숫자로 시작해야 합니다. 잘못된 문자: \" * : ^ $ \\ < > &",
     "custom-property-update": "{{entityName}}의 사용자 정의 속성 '{{propertyName}}' 업데이트가 {{status}}입니다",
     "customize-brand-description": "조직 및 팀의 요구에 맞게 {{brandName}} UX를 맞춤 설정하세요.",
     "customize-entity-landing-page-header-for-persona": "<0>{{persona}}</0> 페르소나를 위한 {{entity}} 엔티티 페이지 경험을 개인화하세요.",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/mr-in.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/mr-in.json
index 2cdc55e2b5f3..3b5279eb8b1c 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/mr-in.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/mr-in.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "नेव्हबार लोगो साठी URL पथ.",
     "custom-properties-description": "तुमच्या डेटा ॲसेटंना समृद्ध करण्यासाठी सानुकूल मेटाडेटा कॅप्चर करा.",
     "custom-property-is-set-to-message": "{{fieldName}} सेट केले आहे",
-    "custom-property-name-validation": "नावामध्ये '::' नसावे.",
+    "custom-property-name-validation": "नाव अक्षर किंवा अंकाने सुरू झाले पाहिजे. अवैध वर्ण: \" * : ^ $ \\ < > &",
     "custom-property-update": "सानुकूल गुणधर्म '{{propertyName}}' चे {{entityName}} मधील अद्यतन {{status}} आहे",
     "customize-brand-description": "तुमच्या संस्थात्मक आणि टीमच्या गरजांसाठी {{brandName}} UX सानुकूलित करा.",
     "customize-entity-landing-page-header-for-persona": "{{persona}} व्यक्तिमत्वासाठी {{entity}} घटक पृष्ठ अनुभव वैयक्तिकृत करा",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/nl-nl.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/nl-nl.json
index 9c050bb5ae94..89e1041dc47c 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/nl-nl.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/nl-nl.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "URL-pad voor het navigatiebalk-logo.",
     "custom-properties-description": "Leg aangepaste metadata vast om uw data-assets te verrijken door het uitbreiden van de attributen.",
     "custom-property-is-set-to-message": "{{fieldName}} is set to",
-    "custom-property-name-validation": "De naam mag geen '::' bevatten.",
+    "custom-property-name-validation": "De naam moet beginnen met een letter of cijfer. Ongeldige tekens: \" * : ^ $ \\ < > &",
     "custom-property-update": "Aangepaste eigenschap '{{propertyName}}' update in {{entityName}} is {{status}}",
     "customize-brand-description": "De {{brandName}} UX aanpassen aan de behoeften van uw organisatie en team.",
     "customize-entity-landing-page-header-for-persona": "Personaliseer de {{entity}} entiteitspagina-ervaring voor de <0>{{persona}}</0> persona",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/pr-pr.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/pr-pr.json
index daaddfa0bce9..0204ce77ec44 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/pr-pr.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/pr-pr.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "مسیر URL برای لوگوی نوار ناوبری.",
     "custom-properties-description": "متادیتای سفارشی را برای غنی‌سازی دارایی‌های داده‌ای خود با افزودن ویژگی‌های اضافی ضبط کنید.",
     "custom-property-is-set-to-message": "{{fieldName}} به مقدار",
-    "custom-property-name-validation": "نام نباید شامل '::' باشد.",
+    "custom-property-name-validation": "نام باید با یک حرف یا عدد شروع شود. نویسه‌های نامعتبر: \" * : ^ $ \\ < > &",
     "custom-property-update": "بروزرسانی ویژگی سفارشی '{{propertyName}}' در {{entityName}} {{status}} است",
     "customize-brand-description": "تجربه کاربری {{brandName}} را برای نیازهای سازمانی و تیمی خود تنظیم کنید.",
     "customize-entity-landing-page-header-for-persona": "تجربه صفحه موجودیت {{entity}} را برای شخصیت <0>{{persona}}</0> شخصی‌سازی کنید",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/pt-br.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/pt-br.json
index 7ba5339defad..26e4cd12ea73 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/pt-br.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/pt-br.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "Caminho da URL para o logotipo da barra de navegação.",
     "custom-properties-description": " Capture metadados personalizados para enriquecer seus ativos de dados ao estender os atributos.",
     "custom-property-is-set-to-message": "{{fieldName}} está definido para",
-    "custom-property-name-validation": "O nome não deve conter '::'.",
+    "custom-property-name-validation": "O nome deve começar com uma letra ou número. Caracteres inválidos: \" * : ^ $ \\ < > &",
     "custom-property-update": "Atualização da propriedade personalizada '{{propertyName}}' em {{entityName}} está {{status}}",
     "customize-brand-description": "Personalize o layout de {{brandName}} para atender às suas necessidades organizacionais e de equipe.",
     "customize-entity-landing-page-header-for-persona": "Personalize a experiência da Página de Entidade {{entity}} para a persona <0>{{persona}}</0>",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/pt-pt.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/pt-pt.json
index 499a2b29368f..23278f81f65b 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/pt-pt.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/pt-pt.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "Caminho da URL para o logotipo da barra de navegação.",
     "custom-properties-description": " Capture metadados personalizados para enriquecer os seus ativos de dados estendendo os atributos.",
     "custom-property-is-set-to-message": "{{fieldName}} está definido como",
-    "custom-property-name-validation": "O nome não deve conter '::'.",
+    "custom-property-name-validation": "O nome deve começar com uma letra ou número. Caracteres inválidos: \" * : ^ $ \\ < > &",
     "custom-property-update": "A atualização da propriedade personalizada '{{propertyName}}' em {{entityName}} está {{status}}",
     "customize-brand-description": "Personalize a experiência {{brandName}} para se adequar às necessidades da sua organização e equipa.",
     "customize-entity-landing-page-header-for-persona": "Personalize a experiência da Página da Entidade {{entity}} para a persona <0>{{persona}}</0>",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/ru-ru.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/ru-ru.json
index e40ae66e45ff..f4c141f7e993 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/ru-ru.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/ru-ru.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "URL-путь для логотипа панели навигации.",
     "custom-properties-description": "Создавайте и настраивайте новые поля для объектов",
     "custom-property-is-set-to-message": "Значение поля {{fieldName}} изменено на",
-    "custom-property-name-validation": "Имя не должно содержать '::'.",
+    "custom-property-name-validation": "Имя должно начинаться с буквы или цифры. Недопустимые символы: \" * : ^ $ \\ < > &",
     "custom-property-update": "Обновление дополнительного поля '{{propertyName}}' в {{entityName}} в статусе {{status}}",
     "customize-brand-description": "Настройте UX {{brandName}} под ваши потребности",
     "customize-entity-landing-page-header-for-persona": "Персонализируйте страницу объекта «{{entity}}» для персоны <0>{{persona}}</0>",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/th-th.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/th-th.json
index bc455cd4ece5..c97d26d56aaf 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/th-th.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/th-th.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "เส้นทาง URL สำหรับโลโก้ในแถบด้านบน",
     "custom-properties-description": "จับข้อมูลเมตาที่กำหนดเองเพื่อเสริมสินทรัพย์ข้อมูลของคุณโดยการขยายคุณสมบัติ",
     "custom-property-is-set-to-message": "{{fieldName}} ถูกตั้งค่าเป็น",
-    "custom-property-name-validation": "ชื่อต้องไม่มี '::'",
+    "custom-property-name-validation": "ชื่อต้องขึ้นต้นด้วยตัวอักษรหรือตัวเลข ตัวอักษรที่ไม่ถูกต้อง: \" * : ^ $ \\ < > &",
     "custom-property-update": "การอัปเดตคุณสมบัติที่กำหนดเอง '{{propertyName}}' ใน {{entityName}} คือ {{status}}",
     "customize-brand-description": "ปรับแต่ง UX ของ {{brandName}} ให้เหมาะสมกับความต้องการขององค์กรและทีมของคุณ",
     "customize-entity-landing-page-header-for-persona": "ปรับแต่งประสบการณ์หน้าเอนทิตี {{entity}} สำหรับบุคคล <0>{{persona}}</0>",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/tr-tr.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/tr-tr.json
index 1d03830ba0a8..8845e5315761 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/tr-tr.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/tr-tr.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "Gezinme çubuğu logosu için URL yolu.",
     "custom-properties-description": "Nitelikleri genişleterek veri varlıklarınızı zenginleştirmek için özel metadata yakalayın.",
     "custom-property-is-set-to-message": "{{fieldName}} şuna ayarlandı:",
-    "custom-property-name-validation": "İsim '::' içermemelidir.",
+    "custom-property-name-validation": "İsim bir harf veya sayı ile başlamalıdır. Geçersiz karakterler: \" * : ^ $ \\ < > &",
     "custom-property-update": "{{entityName}} içindeki '{{propertyName}}' özel özelliği güncellemesi {{status}}",
     "customize-brand-description": "{{brandName}} kullanıcı deneyimini kurumsal ve ekip ihtiyaçlarınıza göre uyarlayın.",
     "customize-entity-landing-page-header-for-persona": "<0>{{persona}}</0> personası için {{entity}} Varlık Sayfası deneyimini kişiselleştirin",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/zh-cn.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/zh-cn.json
index 8f2869c95e02..5d8826eb5dd6 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/zh-cn.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/zh-cn.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "导航栏 Logo 指向的 URL 地址",
     "custom-properties-description": " 获取自定义元数据, 通过扩展属性来丰富数据资产",
     "custom-property-is-set-to-message": "{{fieldName}}设置为",
-    "custom-property-name-validation": "名称不能包含 '::'。",
+    "custom-property-name-validation": "名称必须以字母或数字开头。无效字符：\" * : ^ $ \\ < > &",
     "custom-property-update": "自定义属性'{{propertyName}}'在{{entityName}}中的更新{{status}}",
     "customize-brand-description": "自定义 {{brandName}}, 以满足您的组织和团队需求",
     "customize-entity-landing-page-header-for-persona": "为<0>{{persona}}</0>角色个性化{{entity}}实体页面体验",
diff --git a/openmetadata-ui/src/main/resources/ui/src/locale/languages/zh-tw.json b/openmetadata-ui/src/main/resources/ui/src/locale/languages/zh-tw.json
index da9fc64c0df9..d9da9a203aaf 100644
--- a/openmetadata-ui/src/main/resources/ui/src/locale/languages/zh-tw.json
+++ b/openmetadata-ui/src/main/resources/ui/src/locale/languages/zh-tw.json
@@ -2549,7 +2549,7 @@
     "custom-monogram-url-path-message": "導覽列標誌的 URL 路徑。",
     "custom-properties-description": "透過擴充屬性來擷取自訂元資料，以豐富您的資料資產。",
     "custom-property-is-set-to-message": "{{fieldName}} 已設定為",
-    "custom-property-name-validation": "名稱不能包含 '::'。",
+    "custom-property-name-validation": "名稱必須以字母或數字開頭。無效字元：\" * : ^ $ \\ < > &",
     "custom-property-update": "{{entityName}} 中的自訂屬性 '{{propertyName}}' 更新 {{status}}",
     "customize-brand-description": "量身打造 {{brandName}} 的使用者體驗，以滿足您的組織和團隊需求。",
     "customize-entity-landing-page-header-for-persona": "為 <0>{{persona}}</0> 角色個人化 {{entity}} 實體頁面體驗",