The name of Rome itself has an uncertain origin. It is said that it came from the neme of the King Romulus. But probably the origin came from a merge of different village on the river TIBER. The name of this river too; Tiberis in latin and now TEVERE in italian is said to be very old. perhaps greek. Many theories has been constructed on this river that is not very long, only 405 km. Another thing is PO river, much longer 652 km.Called by the Romans Padus. this river was a natural frontier with the so called GALLIA CISALPINA. now the PO river, the greatest italian river, is the river of Northern Italy.
The italian surnames derived from Roman are at least 15 according to Emidio DE FELICE, the author of the Dictinary of Italian surnames:
Roman Romanin Romani (one of the most common italian surnames) Romanini Romanazzi Romanelli Romanello Romanetti (and so on)
Two surnames comes from TIBERIO, a first name derived form the name of the TIBER: Tiberio Tiberi.