Thank you Toio for providing the links proving my earlier point

. I'd like to once again propose that Venice should NOT be a vassal of Ravenna - it never was in any way dependent of the Exarchate, it was either completely independent (as seen
HERE, after the 730's and the introduction of iconoclasm by Leo III), or vassalized to Constantinople - at least nominally. In-game I think it should be a vassal of Roman Empire, gaining independence around 750, but remaining closely tied to them (e.g. via alliances).
I see also that my earlier proposal of naming the countries exactly after the tribes' names have acquired support. I agree with Basileios I - all tribes of e.g. Poland should have the chance to become Poland after 950 if they subjugate enough Polish lands (IMO the provinces required for this should be 703, 704, 705, 708, 709, and 710, - giving Polans the historically deserved edge, while also enabling any other player-led Polish tribe to create Poland - after all, conquering 6 provinces isn't that much of a problem). Remember also that Poland didn't exist under this name before year 1000. Before that time it was known under the name 'Civitas Schinesghe cum omnibus pertinenciis' (translated as "the country of Gniezno and all it's belongings"). Polans conquered the Goplans around 950; around 970 Mazovia and Sandomiria was taken as well; before 980 they also conquered Przemyśl (1213) and Grody Czerwieńskie (Cherven, 1209). Around (980)-992 Bolesław, the eldest son of Mieszko I, is known to be ruling Krakow - however, as a Bohemian vassal. Shortly before Mieszko's death, Silesia was conquered by the Polans. After Mieszko's death (992), Bolesław drove Mieszko's other sons (from his second marriage with Oda) and their mother out of Schinesghe, thus uniting all Polish lands. It is, of course,
Bolesław I Chrobry I am talking about.
EDIT: See also
THIS map.