The outfit was originally a Camorra group. It wasn´t until 1931, after the Castellammarese war, the outfit was recognized as a Mafia Family and accepted into the Mafia´s fold.
I'm no expert but they seemed pretty diverse during prohibition. Jim Colosimo was from Calabria, Torrio probably from Basilicata. Back in NY, both Capone and Torrio were closely associated Frankie Yale who was Calabrian and Tony Accardo was Sicilian. I know some key members like Capone and Nitti were from Campania, but I'm not sure how much they were influenced by old world traditions.
