Hi Lara,
My name is Nick Potalivo and I'm first generation Italian-Canadian. My father is Michele Potalivo, son of Nicola Potalivo and they came from Montenero DiBisaccia. I'm from Toronto, Canada. I don't know of any Potalivo's in Philadelphia but I do know there are Potalivo's in Niagara Falls, Ontario, Canada. If I can be any help, please e-mail me. Good luck.
Nick