Cassinelli
Normally the last name for homeless people or people who mooch off of others. A chauvinist at heart, they will be very affectionate towards women and befriend them - especially virgins. They mate with and reproduce with one female before moving on to another once the child is of talking age.
Girl 1: "Hey, does your son retain the last name Cassinelli?"
Girl 2: "No, his father and I were never married."
Girl 2: "No, his father and I were never married."