diff --git a/Editor/WorldFixedObjectProcessor.cs b/Editor/WorldFixedObjectProcessor.cs
index 7c2a9354..11030b8a 100644
--- a/Editor/WorldFixedObjectProcessor.cs
+++ b/Editor/WorldFixedObjectProcessor.cs
@@ -37,7 +37,7 @@ namespace nadena.dev.modular_avatar.core.editor
             );
 
             var proxy = CreateProxy();
-    
+
             var parent = retargeter.CreateIntermediateObjects(proxy.gameObject);
 
             var xform = target.transform;
@@ -46,6 +46,11 @@ namespace nadena.dev.modular_avatar.core.editor
             var oscale = xform.lossyScale;
             xform.localScale = new Vector3(oscale.x / pscale.x, oscale.y / pscale.y, oscale.z / pscale.z);
 
+            if (parent.transform.Find(target.gameObject.name) != null)
+            {
+                target.gameObject.name = target.gameObject.name + "$" + GUID.Generate();
+            }
+
             target.transform.SetParent(parent.transform, true);
 
             retargeter.FixupAnimations();
diff --git a/UnitTests~/WorldFixedObjectTest/WorldFixedObjectTest.cs b/UnitTests~/WorldFixedObjectTest/WorldFixedObjectTest.cs
index 904c46ab..ba838bda 100644
--- a/UnitTests~/WorldFixedObjectTest/WorldFixedObjectTest.cs
+++ b/UnitTests~/WorldFixedObjectTest/WorldFixedObjectTest.cs
@@ -1,5 +1,6 @@
 using modular_avatar_tests;
 using nadena.dev.modular_avatar.animation;
+using nadena.dev.modular_avatar.core;
 using nadena.dev.modular_avatar.core.editor;
 using NUnit.Framework;
 using UnityEngine.Animations;
@@ -61,4 +62,25 @@ public class WorldFixedObjectTest : TestBase
         Assert.That(nestedFixedObject, Is.Not.Null);
         Assert.That(nestedFixedObject, Is.EqualTo(nestedFixed));
     }
+
+    [Test]
+    public void NameCollisions()
+    {
+        var avatar = CreateRoot("Avatar");
+        var target1 = CreateChild(avatar, "Target");
+        var target2 = CreateChild(avatar, "Target");
+
+        target1.AddComponent<ModularAvatarWorldFixedObject>();
+        target2.AddComponent<ModularAvatarWorldFixedObject>();
+        
+        // initialize context
+        var buildContext = new BuildContext(avatar);
+        var animationServices = buildContext.PluginBuildContext.ActivateExtensionContext<AnimationServicesContext>();
+
+        new WorldFixedObjectProcessor().Process(buildContext);
+        
+        Assert.AreSame(target1.transform.parent, target2.transform.parent);
+        Assert.AreNotSame(target1.transform.parent, avatar.transform);
+        Assert.AreNotSame(target1.gameObject.name, target2.gameObject.name);
+    }
 }
\ No newline at end of file