I just noticed on the map that there is a large island between northern Castille and Vodacce. What do you guys think? Genoa based? Or more Sardinia divided between the Vodacce princes rather than its own Republic? Or hell with how the map is scrambled compared to Europe it could be Sicily-based (which I believe was Spanish claimed in the 17th century)!
I'd suggest Corsica, but I think it's too removed from Montaigne for that to work.