Store original node name in userData.

examples/js/loaders/GLTFLoader.js

@@ -2996,6 +2996,7 @@ THREE.GLTFLoader = ( function () {
 
 			if ( nodeDef.name !== undefined ) {
 
+				node.userData.name = nodeDef.name;
 				node.name = THREE.PropertyBinding.sanitizeNodeName( nodeDef.name );
 
 			}