Princes of Nettuno Principi di Nettuno Records #4 Holders Family filter On/Off 2 Marcantonio Borghese, 8th prince of Sulmona * 1814 3 Paolo Borghese, 9th prince of Sulmona * 1845 3 Rodolfo Borghese, 3rd prince of Nettuno * 1880 5 Giovanni-Angelo Borghese, 5th prince of Nettuno * 1928 Corrections and Updates To suggest a correction or an update. Click Here