Yeah, that I knew, and I'm partially basing the upcoming plotline on the stuff in the Gazetteer. The Nagah I'm describing are bestial, like orcs or Uruk-Hai with scales, and I've been equating the Nagazi with Athens and Nagaral with Sparta, in demeanor at least, if not technology, weapon style, etc.
Really, at the moment I'm just looking for suggestions about which culture to pick for them in terms of character gen. They'll be NPCs, of course, but I like to use the character generator to make my really important NPCs, so that I have fully developed info on them that I can riff on as I interface them with the players.