According to Michael Cain, his grandfather changed his name to get a new start, to escape creditors, and to avoid prejudice against Italians. I can think of some other Italians connected with the underworld who changed their names but never denied their heritage, but only a few from Chicago come to mind. Francesco Castiglia became Frank Costello, Alberto Anastasio became Albert Anastasia, Al Capone's older brother Vincenzo became Richard Hart, Vincenzo Gibaldi became Jack McGurn, Filippo Sacco became John Rosselli, and Marcellino Caifano became Marshall Caifano then legally changed his name to John Marshall.