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So, Northern and Southern Italian regionalism is a thing. Corsica, Padania, Sardinia, Sicily, Venetia, etc...
Northern and Southern Italy are also the regions most historically independent or ruled by foreign families and powers, as much of Central Italy (bar Florence / Tuscany I suppose) was under the rule or influence of the Papal States.
So, my question is two fold:
Is there a regional name for Central Italy (not Papal States) that could have sufficed as the name of a polity?
If there isn't, would taking on the name "Lazio" (from Latium) or adopting a Riverine naming (ala Padania) be suitable?