diff --git a/.chronus/changes/main-2024-4-11-15-5-45.md b/.chronus/changes/main-2024-4-11-15-5-45.md
new file mode 100644
index 0000000000..3b1b757c77
--- /dev/null
+++ b/.chronus/changes/main-2024-4-11-15-5-45.md
@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@azure-tools/typespec-client-generator-core"
+---
+
+change from using logical result to final result
\ No newline at end of file
diff --git a/.chronus/changes/main-2024-4-11-15-7-31.md b/.chronus/changes/main-2024-4-11-15-7-31.md
new file mode 100644
index 0000000000..03f0940df5
--- /dev/null
+++ b/.chronus/changes/main-2024-4-11-15-7-31.md
@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@azure-tools/typespec-client-generator-core"
+---
+
+add union support for templated model naming
\ No newline at end of file
diff --git a/packages/typespec-client-generator-core/src/public-utils.ts b/packages/typespec-client-generator-core/src/public-utils.ts
index 31b22e5cbd..d9a45ebfa7 100644
--- a/packages/typespec-client-generator-core/src/public-utils.ts
+++ b/packages/typespec-client-generator-core/src/public-utils.ts
@@ -195,7 +195,10 @@ export function getLibraryName(
       type.templateMapper.args
         .filter(
           (arg): arg is Model | Enum =>
-            "kind" in arg && (arg.kind === "Model" || arg.kind === "Enum") && arg.name.length > 0
+            "kind" in arg &&
+            (arg.kind === "Model" || arg.kind === "Enum" || arg.kind === "Union") &&
+            arg.name !== undefined &&
+            arg.name.length > 0
         )
         .map((arg) => pascalCase(arg.name))
         .join("")
diff --git a/packages/typespec-client-generator-core/src/types.ts b/packages/typespec-client-generator-core/src/types.ts
index 3de24fdc41..d4f602588c 100644
--- a/packages/typespec-client-generator-core/src/types.ts
+++ b/packages/typespec-client-generator-core/src/types.ts
@@ -1302,22 +1302,24 @@ function updateTypesFromOperation(
   }
   const lroMetaData = getLroMetadata(program, operation);
   if (lroMetaData && generateConvenient) {
-    const logicalResults = diagnostics.pipe(
-      checkAndGetClientType(context, lroMetaData.logicalResult, operation)
-    );
-    logicalResults.forEach((logicalResult) => {
-      updateUsageOfModel(context, UsageFlags.Output, logicalResult);
-    });
-
-    if (!context.arm) {
-      // TODO: currently skipping adding of envelopeResult due to arm error
-      // https://github.com/Azure/typespec-azure/issues/311
-      const envelopeResults = diagnostics.pipe(
-        checkAndGetClientType(context, lroMetaData.envelopeResult, operation)
+    if (lroMetaData.finalResult !== undefined && lroMetaData.finalResult !== "void") {
+      const finalResults = diagnostics.pipe(
+        checkAndGetClientType(context, lroMetaData.finalResult, operation)
       );
-      envelopeResults.forEach((envelopeResult) => {
-        updateUsageOfModel(context, UsageFlags.Output, envelopeResult);
+      finalResults.forEach((finalResult) => {
+        updateUsageOfModel(context, UsageFlags.Output, finalResult);
       });
+
+      if (!context.arm) {
+        // TODO: currently skipping adding of envelopeResult due to arm error
+        // https://github.com/Azure/typespec-azure/issues/311
+        const envelopeResults = diagnostics.pipe(
+          checkAndGetClientType(context, lroMetaData.envelopeResult, operation)
+        );
+        envelopeResults.forEach((envelopeResult) => {
+          updateUsageOfModel(context, UsageFlags.Output, envelopeResult);
+        });
+      }
     }
   }
   return diagnostics.wrap(undefined);
diff --git a/packages/typespec-client-generator-core/test/package.test.ts b/packages/typespec-client-generator-core/test/package.test.ts
index 5240e34797..c94e29ad40 100644
--- a/packages/typespec-client-generator-core/test/package.test.ts
+++ b/packages/typespec-client-generator-core/test/package.test.ts
@@ -2736,6 +2736,8 @@ describe("typespec-client-generator-core: package", () => {
       strictEqual(method.name, "delete");
       strictEqual(method.kind, "lro");
       strictEqual(method.response.type, undefined);
+      strictEqual(runnerWithCore.context.experimental_sdkPackage.models.length, 0);
+      strictEqual(runnerWithCore.context.experimental_sdkPackage.enums.length, 1);
     });
     it("paging", async () => {
       const runnerWithCore = await createSdkTestRunner({
@@ -3376,6 +3378,57 @@ describe("typespec-client-generator-core: package", () => {
       deepStrictEqual(headerParam.apiVersions, ["v2"]);
     });
   });
+
+  describe("lro", () => {
+    it("customized lro delete", async () => {
+      const runnerWithCore = await createSdkTestRunner({
+        librariesToAdd: [AzureCoreTestLibrary],
+        autoUsings: ["Azure.Core"],
+        emitterName: "@azure-tools/typespec-java",
+      });
+      await runnerWithCore.compile(`
+        @versioned(MyVersions)
+        @server("http://localhost:3000", "endpoint")
+        @service({name: "Service"})
+        namespace My.Service;
+
+        enum MyVersions {
+          @useDependency(Versions.v1_0_Preview_2)
+          v1: "v1",
+        }
+
+        op delete(): {
+          ...AcceptedResponse,
+          @header("Location")
+          @Azure.Core.pollingLocation(Azure.Core.StatusMonitorPollingOptions<ArmOperationStatus>)
+          @Azure.Core.finalLocation(void)
+          location?: string;
+        };
+
+        @Azure.Core.lroStatus
+        union ResourceProvisioningState {
+          Succeeded: "Succeeded",
+          Failed: "Failed",
+          Canceled: "Canceled",
+          string,
+        }
+
+        model ArmOperationStatus {
+          @Azure.Core.lroStatus
+          status: ResourceProvisioningState;
+          @key
+          @path
+          @segment("operationStatuses")
+          id: Azure.Core.uuid;
+          @visibility("read")
+          name?: string;
+        }
+      `);
+      const sdkPackage = runnerWithCore.context.experimental_sdkPackage;
+      strictEqual(sdkPackage.models.length, 0);
+      strictEqual(sdkPackage.enums.length, 1);
+    });
+  });
 });
 
 function getServiceMethodOfClient(
diff --git a/packages/typespec-client-generator-core/test/public-utils.test.ts b/packages/typespec-client-generator-core/test/public-utils.test.ts
index b26677aa44..0c65ff1afa 100644
--- a/packages/typespec-client-generator-core/test/public-utils.test.ts
+++ b/packages/typespec-client-generator-core/test/public-utils.test.ts
@@ -880,6 +880,35 @@ describe("typespec-client-generator-core: public-utils", () => {
       const model = models.filter((x) => x.name === "ResourceOperationStatusUser")[0];
       ok(model);
     });
+
+    it("template without @friendlyName renaming for union as enum", async () => {
+      await runner.compileWithBuiltInService(`
+      union DependencyOfOrigins {
+        serviceExplicitlyCreated: "ServiceExplicitlyCreated",
+        userExplicitlyCreated: "UserExplicitlyCreated",
+        string,
+      }
+
+      model DependencyOfRelationshipProperties
+        is BaseRelationshipProperties<DependencyOfOrigins>;
+
+      model BaseRelationshipProperties<TOrigin> {
+        originInformation: RelationshipOriginInformation<TOrigin>;
+      }
+
+      model RelationshipOriginInformation<TOrigin = string> {
+        relationshipOriginType: TOrigin;
+      }
+
+      op test(): DependencyOfRelationshipProperties;
+      `);
+      const models = runner.context.experimental_sdkPackage.models;
+      strictEqual(models.length, 2);
+      const model = models.filter(
+        (x) => x.name === "RelationshipOriginInformationDependencyOfOrigins"
+      )[0];
+      ok(model);
+    });
   });
 
   describe("getGeneratedName", () => {