 His mother was a seamstress and his father was a professional bowler.DiLeonardo had two brothers; Colombo crime family mobster Robert DiLeonardo (who was murdered July 16, 1981 on orders of Cosa Nostra, thus Michael could not retaliate) and James (Giovanni) DiLeonardo.DiLeonardo's grandfather, Vincenzo DiLeonardo, was a captain in the Brooklyn faction run by Salvatore D'Aquila who was the boss of bosses at that time.. As a young boy, DiLeonardo met Gambino boss Carlo Gambino several times at his grandfather's house.