I think it would be much simpler to say "HAiki"- Dan Harden's Aiki, when referencing the "IP IT IS" idea of Aiki. Since Dan is the major promoting factor behind this idea of Aiki.
HAiki clearly shows a difference, and give's credit to it's main promoting force.
I think that Dan pretty clearly says that it's not his idea, not his method, not his creation.
I'm sure he'll reply himself, though...