The Following is the official info from various sources compiled by Wikipedia. Know its all BS and the powers that be in Hollywood, along with the military created these characters and implanted them in the fabric of the US culture.
Salvatore "Mooney Sam" Giancana, better known as Sam Giancana, was a Sicilian American mobster, notable for being boss of the Chicago Outfit from 1957–1966. Among his other nicknames were, "Momo", "Sam the Cigar," and "Sammy." Wikipedia