"Former head of the Gambino crime family John G. took pride in the fact that he had no nickname among his peers—everyone knew who you meant if you said "John." Members of the press called him the "Dapper Don," the "Teflon Don," and, following his conviction in 1992, the "Velcro Don.""
Quote some reporter reporting on the history of mob nicknames, make of it what you will.
John Gambino? surprised I think so!