diff --git a/examples/templates/page.html b/examples/templates/page.html
index 398f601..065921f 100644
--- a/examples/templates/page.html
+++ b/examples/templates/page.html
@@ -20,7 +20,7 @@ main { margin: 3em; }
   <footer>
     {%- for k, v in [('testA','Config'),('testB','Simple'),('testC','Advanced')] %}
     <div>{{v}} Tags:
-      {%- for x in this|groupby(k, recursive=True)|list|unique|sort %} 
+      {%- for x in this|vgroups(k, recursive=True)|unique|sort %} 
         <a href="{{ x|url }}">({{x.key}})</a>
       {%- endfor %} 
     </div>
diff --git a/lektor_groupby/plugin.py b/lektor_groupby/plugin.py
index 221a2d7..c9fc1c1 100644
--- a/lektor_groupby/plugin.py
+++ b/lektor_groupby/plugin.py
@@ -16,7 +16,7 @@ class GroupByPlugin(Plugin):
     def on_setup_env(self, **extra: object) -> None:
         self.creator = GroupBy()
         self.env.add_build_program(GroupBySource, GroupByBuildProgram)
-        self.env.jinja_env.filters.update(groupby=GroupBySource.of_record)
+        self.env.jinja_env.filters.update(vgroups=GroupBySource.of_record)
 
         # resolve /tag/rss/ -> /tag/rss/index.html (local server only)
         @self.env.urlresolver
diff --git a/lektor_groupby/vobj.py b/lektor_groupby/vobj.py
index 5e7b603..6c7054b 100644
--- a/lektor_groupby/vobj.py
+++ b/lektor_groupby/vobj.py
@@ -147,9 +147,9 @@ class GroupBySource(VirtualSourceObject):
     def _reverse_reference_records(self) -> None:
         ''' Attach self to page records. '''
         for child in self._children:
-            if not hasattr(child, '_groupby'):
-                child._groupby = WeakSet()  # type: ignore[attr-defined]
-            child._groupby.add(self)  # type: ignore[attr-defined]
+            if not hasattr(child, '_vgroups'):
+                child._vgroups = WeakSet()  # type: ignore[attr-defined]
+            child._vgroups.add(self)  # type: ignore[attr-defined]
 
     @staticmethod
     def of_record(
@@ -169,9 +169,9 @@ class GroupBySource(VirtualSourceObject):
             page = proc_list.pop(0)
             if recursive and hasattr(page, 'children'):
                 proc_list.extend(page.children)  # type: ignore[attr-defined]
-            if not hasattr(page, '_groupby'):
+            if not hasattr(page, '_vgroups'):
                 continue
-            for vobj in page._groupby:  # type: ignore[attr-defined]
+            for vobj in page._vgroups:  # type: ignore[attr-defined]
                 if not keys or vobj.config.key in keys:
                     yield vobj