[Dustin]

If you want them to be somewhat recognizable as dwarves, but cue the players that they are Different, you might call them [adjective] dwarves, much the way grey dwarves in That Other Game are very different from the standard model. Perhaps Silver Dwarves or some adjective that actually has to do with their unusual social structure (Clan Dwarves, Harem Dwarves, whatever).