I watched it and from the information I gathered my guess would be, if he had a son, I'm unaware if he did or not but Anthony Capo's son.

Capo just recently died of a heart attack in 2012, so who knows.

But as said on another board who had posted this, his father could have just been a "nobody", no one of real importance.

EDIT: A thing I thought was strange was that he doesn't seem to have one of those distinct NY accents, maybe one from New England or something? Maybe one of the Americans on this board could elaborate.