The FBI set the Families names in stone during the Valachi hearings, with the exception of the Colombo family, at the time Magliocco was the boss, but the FBI had illegal wiretaps and found out that Joe Colombo had became the boss of that family.

Most made guys did not know what family they belong to only by saying who they were with, like they are with the West Side (Genovese), the Bronx(Lucchese), Mulberry Street (Gambino), Williamsburg(Bonanno)