Anyway, I have enough to be going forth on, though I need to name two mountain ranges, a plateau, four seas, a conquered people, and an obscene amount of rivers.
This is totally not going to be a Guy Gavriel Kay-esque not-really-alternate-history: I'm inventing a whole new world and geography here, with cultures and peoples that may not bear any close resemblance to any given earth culture. But since you have to start somewhere, I'm starting from the Silk Road and the Mongol Empires. And the fates alone know where we'll end up.
But I have got a list of cities. Which I shall write down here, because I have been having entirely too much fun looking up ancient nicknames for cities and then misspelling them.
Messaline, Tasafon, Asitaneh, Asmaracanda, Qeshqer, Tsarepheth, Rasa, and Qarash. La! (The real trick is making the linguistic groups plain without being terribly obvious about it.)