Hmm, Etruscans might work. They are interesting because the language they spoke was a language isolate, not related to the Indo-European languages around them. I'm not sure how much we actually know about their language, but I know they wrote in the Greek script. Same thing applies to the Minoans (although some researchers believe that Minoan, Etruscan, Rhaetian and Lemnian were part of a pre-Indo-European language family called Aegean or Tyrsenian). I think I might just stick with the six I have now... Btw, I'm sort of waiting until a later edition of 0 AD comes out to actually start modelling, because I think that some of the Persian units look like they would make good bases for these ancient units.