diff --git a/plugins/catalog-react/src/utils/isOwnerOf.ts b/plugins/catalog-react/src/utils/isOwnerOf.ts
index e62a0db1ba..38ad90e4a6 100644
--- a/plugins/catalog-react/src/utils/isOwnerOf.ts
+++ b/plugins/catalog-react/src/utils/isOwnerOf.ts
@@ -16,10 +16,10 @@
 
 import {
   Entity,
-  EntityName,
   getEntityName,
   RELATION_MEMBER_OF,
   RELATION_OWNED_BY,
+  stringifyEntityRef,
 } from '@backstage/catalog-model';
 import { getEntityRelations } from './getEntityRelations';
 
@@ -27,22 +27,19 @@ import { getEntityRelations } from './getEntityRelations';
  * Get the related entity references.
  */
 export function isOwnerOf(owner: Entity, owned: Entity) {
-  const possibleOwners: EntityName[] = [
-    ...getEntityRelations(owner, RELATION_MEMBER_OF, { kind: 'group' }),
-    ...(owner ? [getEntityName(owner)] : []),
-  ];
+  const possibleOwners = new Set(
+    [
+      ...getEntityRelations(owner, RELATION_MEMBER_OF, { kind: 'group' }),
+      ...(owner ? [getEntityName(owner)] : []),
+    ].map(stringifyEntityRef),
+  );
 
-  const owners = getEntityRelations(owned, RELATION_OWNED_BY);
+  const owners = getEntityRelations(owned, RELATION_OWNED_BY).map(
+    stringifyEntityRef,
+  );
 
   for (const ownerItem of owners) {
-    if (
-      possibleOwners.find(
-        o =>
-          ownerItem.kind.toLowerCase() === o.kind.toLowerCase() &&
-          ownerItem.namespace.toLowerCase() === o.namespace.toLowerCase() &&
-          ownerItem.name.toLowerCase() === o.name.toLowerCase(),
-      ) !== undefined
-    ) {
+    if (possibleOwners.has(ownerItem)) {
       return true;
     }
   }