If you think that other regions or cultures should take priority it’s ok, but do not mistakenly state that venetians can be represented/included by Italians at that period.
They are 2 different things.
Italians with a big stretch can be identified in the kingdom in North Italy formed after the split of Charlemagne empire, or by the states that Barbarossa tried to conquer. But Venice was never a part of either of them.
It was a republic and more related to the bizzantines than to the west Europe, in fact after the bizzantines lost control of North Italy, Venice stayed indipendent until Napoleon.
I can’t help you on the other 3, but I made a civ concept for this ones, since I know it’s history well enough.