I am working on a piece of fiction where the various nations are inspired by Medical European populations. Rather than go with the major stereotypical populations that most people tend to draw influence from (AKA Germany, France, Russia, Etc) I would like to highlight some of Medieval Europe's lesser known minorities/populations.
The Volhynian Hetmanate (based off of Ukrainian Cassocks)
The Gitani Kaale (Romani/Gypsy: haven’t decided what nationality, maybe Italian, French or Hungarian.)
The Kingdom of Tengria ( Draws heavily on the Kingdom of Khazaria & Medieval European Jewish Diaspora)
Actually so far it looks like I could do the whole thing drawing solely on Eastern European populations, but I am willing to consider any suggestions. Other ideas might include Moors, Gnostics, etc. I am trying to avoid even medium sized modern populations such as Czechs, but sub-populations within a major community would be great. So for example, Spain would be a no no, but Basque would be a go!