Finns, Estonians, Sami and Karelians are Finno-Ugric. There are numerous remaining Finno-Ugric peoples in Western Siberia.
Even the distant Hungarians are Finno-Ugric.
It would be nice to see in AoE 2 Finns or Urals (civ umbrella for Finno-Ugric peoples).
I think this civ could appear in another DLC along with the Eskimos - they would have their own architecture, corresponding to the one they lived in in very cold regions.