You mean the Roman emperors? If so, they spoke Latin and not Italian. No one knows exactly how spoken Latin might have sounded but it is a pretty straightforward language.
(You do not need apostrophes to make plural proper nouns.)
No, because mob accents are by Eastern American people of Italian descent speaking English. The Caesars were speaking Latin. If it sounded like anything recognizable today, it was probably close to modern day Italian. But that is a wild-ass guess.
If they had been speaking English it might have been close, but not necessarily the same. When I was in Bath, England with my family an Italian-British owner of a restaurant came over to talk to us and my dad thought he was from Brooklyn. LOL.