diff --git a/packages/errors/api-report.md b/packages/errors/api-report.md
index cb7cf14204..3ece63035b 100644
--- a/packages/errors/api-report.md
+++ b/packages/errors/api-report.md
@@ -11,13 +11,13 @@ export function assertError(value: unknown): asserts value is ErrorLike;
 // @public
 export class AuthenticationError extends CustomErrorBase {
   // (undocumented)
-  name: string;
+  name: 'AuthenticationError';
 }
 
 // @public
 export class ConflictError extends CustomErrorBase {
   // (undocumented)
-  name: string;
+  name: 'ConflictError';
 }
 
 // @public
@@ -81,7 +81,7 @@ export class ForwardedError extends CustomErrorBase {
 // @public
 export class InputError extends CustomErrorBase {
   // (undocumented)
-  name: string;
+  name: 'InputError';
 }
 
 // @public
@@ -90,25 +90,25 @@ export function isError(value: unknown): value is ErrorLike;
 // @public
 export class NotAllowedError extends CustomErrorBase {
   // (undocumented)
-  name: string;
+  name: 'NotAllowedError';
 }
 
 // @public
 export class NotFoundError extends CustomErrorBase {
   // (undocumented)
-  name: string;
+  name: 'NotFoundError';
 }
 
 // @public
 export class NotImplementedError extends CustomErrorBase {
   // (undocumented)
-  name: string;
+  name: 'NotImplementedError';
 }
 
 // @public
 export class NotModifiedError extends CustomErrorBase {
   // (undocumented)
-  name: string;
+  name: 'NotModifiedError';
 }
 
 // @public
diff --git a/packages/errors/src/errors/CustomErrorBase.ts b/packages/errors/src/errors/CustomErrorBase.ts
index c7990080c5..af3c10956f 100644
--- a/packages/errors/src/errors/CustomErrorBase.ts
+++ b/packages/errors/src/errors/CustomErrorBase.ts
@@ -53,7 +53,10 @@ export class CustomErrorBase extends Error {
 
     Error.captureStackTrace?.(this, this.constructor);
 
-    this.name = 'CustomErrorBase';
+    if (!this.name) {
+      this.name = this.constructor.name;
+    }
+
     this.cause = isError(cause) ? cause : undefined;
   }
 }
diff --git a/packages/errors/src/errors/common.ts b/packages/errors/src/errors/common.ts
index af5b7d370e..861c3a7c3a 100644
--- a/packages/errors/src/errors/common.ts
+++ b/packages/errors/src/errors/common.ts
@@ -34,7 +34,7 @@ import { CustomErrorBase } from './CustomErrorBase';
  * @public
  */
 export class InputError extends CustomErrorBase {
-  name = 'InputError';
+  name = 'InputError' as const;
 }
 
 /**
@@ -43,7 +43,7 @@ export class InputError extends CustomErrorBase {
  * @public
  */
 export class AuthenticationError extends CustomErrorBase {
-  name = 'AuthenticationError';
+  name = 'AuthenticationError' as const;
 }
 
 /**
@@ -52,7 +52,7 @@ export class AuthenticationError extends CustomErrorBase {
  * @public
  */
 export class NotAllowedError extends CustomErrorBase {
-  name = 'NotAllowedError';
+  name = 'NotAllowedError' as const;
 }
 
 /**
@@ -64,7 +64,7 @@ export class NotAllowedError extends CustomErrorBase {
  * @public
  */
 export class NotFoundError extends CustomErrorBase {
-  name = 'NotFoundError';
+  name = 'NotFoundError' as const;
 }
 
 /**
@@ -74,7 +74,7 @@ export class NotFoundError extends CustomErrorBase {
  * @public
  */
 export class ConflictError extends CustomErrorBase {
-  name = 'ConflictError';
+  name = 'ConflictError' as const;
 }
 
 /**
@@ -83,7 +83,7 @@ export class ConflictError extends CustomErrorBase {
  * @public
  */
 export class NotModifiedError extends CustomErrorBase {
-  name = 'NotModifiedError';
+  name = 'NotModifiedError' as const;
 }
 
 /**
@@ -92,7 +92,7 @@ export class NotModifiedError extends CustomErrorBase {
  * @public
  */
 export class NotImplementedError extends CustomErrorBase {
-  name = 'NotImplementedError';
+  name = 'NotImplementedError' as const;
 }
 
 /**