That corresponds with that site I posted earlier. The name exists predominantly in Abruzzo and Lazio.
Does anybody know the ancestry of Pietrantonio? I presumed the guy was Sicilian because he was close to the other Sicilians such as [BadWord], Rizzuto, Lo Presti and later Montagna, but I now think he probably hails from the mainland too.
"It was between the brothers Kay -- I had nothing to do with it."