He had an older brother, both were also supposedly pretty good cat burgalars back in those days, his brother was also a made guy in the Bioardo Genovese Crew. His older brother went by the name of Big Pussy Russo. So evidently, being the little brother, and a good thief they called him Little Pussy.

Little Pussy was later murdered at the orders of The Boot, under suspicions of being a rat. Fact is he probably wasn't, but he talked too much, and wasn't very liked by pretty much anyone after a while, and his older brother was somewhat his protector. Once Big Pussy died, his death notice was sealed.