[Italy WI] - Lazio or Tiberia, a name for Central Italy?

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:
  1. Is there a regional name for Central Italy (not Papal States) that could have sufficed as the name of a polity?
  2. If there isn't, would taking on the name "Lazio" (from Latium) or adopting a Riverine naming (ala Padania) be suitable?
 
Umbria would suffice as a polity name if you're looking for one, though give the regional importance of Rome I imagine any state formed might want to latch onto the prestige/legitimacy of the city and name the region Romania or something to that effect.
 
"Etruria" was floated at times, but usually refers to just Tuscany and surroundings.
"Romania" has an obvious problem, but the cognate "Romagna" actually exists, referring to the area of Byzantine rule on the Northwestern Adriatic (not including Rome, though the ERE controlled it as well).
There is no Central Italian shared identity, and never has been one, despite most of the region having been part of the same political sphere (Papal States) for a long time, and most local dialects being quite close to each other and mostly mutually intelligible (which is largely not the case with Northern and Southern vernaculars). Regional identities (Tuscan, Umbrian etc. ) do exist but some of them are fairly weak; in Lazio, Rome is very central and has a strong identity, not so much for the rest of the region where identity is more predicated on subregional levels: Tuscia, Sabina, Ciociaria; similarly, the Marche region has a marked distinction between a "Picene" area, itself bitterly divided by municipal rivalries as most of Central Italy at large, and a Northern area which lacks a commonly accepted unifying name - should be "Senonia" going by the common take of using pre-roman peoples as namesakes, but nobody uses that - but gravitates culturally and linguistically toward neighbouring Romagna to the North. Tuscany has a strong shared identity but Tuscan cities famously hate each other with a passion and citizens identify with their town first, the region usually a distant second. The Pisa-Livorno rivalry is nationally notorious and a frequent source of jokes.
Central Italy is arguably the area where municipalism has remained stronger (though it is commonplace everywhere in Italy) possibly because of the weak integrative ability of the Papal states.
 
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