Quote - I thought the standard was that "Hip" is universally the parent actor for the entire rigging hierarchy.  The Hip2 actor is a child of Hip, which is still at the top of the hierarchy.  Lacking an existing naming convention for a single actor between the Hip and the Thighs, Hip2 was selected.  Or is there a standard name for such an actor?    If there are two intervening actors, they're the Buttocks.  But here, there's only the one actor.

Exactly.