OpenAPITools · wing328 · May 7, 2026 · May 7, 2026 · May 7, 2026 · May 7, 2026
diff --git a/...i-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java b/...i-generator/src/main/java/org/openapitools/codegen/languages/PowerShellClientCodegen.java
@@ -1530,7 +1530,7 @@ public GeneratorLanguage generatorLanguage() {
 
     @Override
     public String toEnumVarName(String name, String datatype) {
-        if (name.length() == 0) {
+        if (name.isEmpty()) {
             return "EMPTY";
         }
 
@@ -1539,8 +1539,9 @@ public String toEnumVarName(String name, String datatype) {
             return (getSymbolName(name)).toUpperCase(Locale.ROOT);
         }
 
-        // number
-        if ("Int16".equals(datatype) || "Int32".equals(datatype) || "Int64".equals(datatype) ||
+        if (name.matches("^\\d.*") || // any data type (including string) starting with a number
+                // numeric data type
+                "Int16".equals(datatype) || "Int32".equals(datatype) || "Int64".equals(datatype) ||
                 "UInt16".equals(datatype) || "UInt32".equals(datatype) || "UInt64".equals(datatype) ||
                 "Double".equals(datatype) || "Single".equals(datatype) || "Decimal".equals(datatype)) {
             String varName = name;

diff --git a/...s/3_0/powershell/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml b/...s/3_0/powershell/petstore-with-fake-endpoints-models-for-testing-with-http-signature.yaml
@@ -1812,6 +1812,12 @@ components:
       - 0
       - 1
       - 2
+    OuterEnumStringStartingWithNumber:
+      type: string
+      enum:
+      - '0'
+      - '1'
+      - '2'
     OuterEnumDefaultValue:
       type: string
       enum:

diff --git a/samples/client/petstore/powershell/.openapi-generator/FILES b/samples/client/petstore/powershell/.openapi-generator/FILES
@@ -54,6 +54,7 @@ docs/OuterEnum.md
 docs/OuterEnumDefaultValue.md
 docs/OuterEnumInteger.md
 docs/OuterEnumIntegerDefaultValue.md
+docs/OuterEnumStringStartingWithNumber.md
 docs/PSAnotherFakeApi.md
 docs/PSDefaultApi.md
 docs/PSFakeApi.md
@@ -144,6 +145,7 @@ src/PSPetstore/Model/OuterEnum.ps1
 src/PSPetstore/Model/OuterEnumDefaultValue.ps1
 src/PSPetstore/Model/OuterEnumInteger.ps1
 src/PSPetstore/Model/OuterEnumIntegerDefaultValue.ps1
+src/PSPetstore/Model/OuterEnumStringStartingWithNumber.ps1
 src/PSPetstore/Model/ParentPet.ps1
 src/PSPetstore/Model/Pet.ps1
 src/PSPetstore/Model/PetWithRequiredTags.ps1

diff --git a/samples/client/petstore/powershell/README.md b/samples/client/petstore/powershell/README.md
@@ -156,6 +156,7 @@ Class | Method | HTTP request | Description
  - [PSPetstore\Model.OuterEnumDefaultValue](docs/OuterEnumDefaultValue.md)
  - [PSPetstore\Model.OuterEnumInteger](docs/OuterEnumInteger.md)
  - [PSPetstore\Model.OuterEnumIntegerDefaultValue](docs/OuterEnumIntegerDefaultValue.md)
+ - [PSPetstore\Model.OuterEnumStringStartingWithNumber](docs/OuterEnumStringStartingWithNumber.md)
  - [PSPetstore\Model.ParentPet](docs/ParentPet.md)
  - [PSPetstore\Model.Pet](docs/Pet.md)
  - [PSPetstore\Model.PetWithRequiredTags](docs/PetWithRequiredTags.md)

diff --git a/samples/client/petstore/powershell/docs/OuterEnumStringStartingWithNumber.md b/samples/client/petstore/powershell/docs/OuterEnumStringStartingWithNumber.md
@@ -0,0 +1,20 @@
+# OuterEnumStringStartingWithNumber
+## Properties
+
+Name | Type | Description | Notes
+------------ | ------------- | ------------- | -------------
+
+## Examples
+
+- Prepare the resource
+```powershell
+$OuterEnumStringStartingWithNumber = Initialize-PSPetstoreOuterEnumStringStartingWithNumber 
+```
+
+- Convert the resource to JSON
+```powershell
+$OuterEnumStringStartingWithNumber | ConvertTo-JSON
+```
+
+[[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
+
diff --git a/...les/client/petstore/powershell/src/PSPetstore/Model/OuterEnumStringStartingWithNumber.ps1 b/...les/client/petstore/powershell/src/PSPetstore/Model/OuterEnumStringStartingWithNumber.ps1
@@ -0,0 +1,26 @@
+#
+# OpenAPI Petstore
+# This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: "" \
+# Version: 1.0.0
+# Generated by OpenAPI Generator: https://openapi-generator.tech
+#
+
+<#
+.SYNOPSIS
+
+Enum OuterEnumStringStartingWithNumber.
+
+.DESCRIPTION
+
+No description available.
+#>
+
+enum OuterEnumStringStartingWithNumber {
+    # enum value: "0"
+    NUMBER_0
+    # enum value: "1"
+    NUMBER_1
+    # enum value: "2"
+    NUMBER_2
+}
+
diff --git a/samples/client/petstore/powershell/tests/Model/OuterEnumStringStartingWithNumber.Tests.ps1 b/samples/client/petstore/powershell/tests/Model/OuterEnumStringStartingWithNumber.Tests.ps1
@@ -0,0 +1,17 @@
+#
+# OpenAPI Petstore
+# This spec is mainly for testing Petstore server and contains fake endpoints, models. Please do not use this for any other purpose. Special characters: "" \
+# Version: 1.0.0
+# Generated by OpenAPI Generator: https://openapi-generator.tech
+#
+
+Describe -tag 'PSPetstore' -name 'PSOuterEnumStringStartingWithNumber' {
+    Context 'PSOuterEnumStringStartingWithNumber' {
+        It 'Initialize-PSOuterEnumStringStartingWithNumber' {
+            # a simple test to create an object
+            #$NewObject = Initialize-PSOuterEnumStringStartingWithNumber
+            #$NewObject | Should -BeOfType OuterEnumStringStartingWithNumber
+            #$NewObject.property | Should -Be 0
+        }
+    }
+}