Sonny Cangelosi was the Don of the Gambetti Family until his death in 1978 and was the uncle of Jon Gravelli, who succeeded him.
Trivia
- Sonny seems to be based upon Carlo Gambino, since he was leader of the Gambino crime family (upon which the Gambettis are based), and was succeeded by John Gotti (and Jon Gravelli shares some traits with Gotti).
- His name is probably a reference to the character "Sonny Corleone" from the "The Godfather" movie.