I have no idea; I haven't looked that far into his biography.
http://en.wikipedia.org/wiki/Rudy_Giuliani
Giuliani was born in Brooklyn, New York, raised in Garden City South on Long Island, to Harold Angel Giuliani and Helen C. D'Avanzo, the children of Italian immigrants. He attended Manhattan College before graduating from the New York University School of Law cum laude in 1968.