With no male heirs, he is currently to be succeeded as Duke of Gravina by his unmarried brother Benedetto (b. 1956), then by his cousin  Don  Raimondo Orsini d'Aragona (b. 1931), whose heir is  Don  Lelio Orsini (b. 1981). [ edit ] Orsini-Rosenberg An  Austrian  princely family, the  Rosenberg  changed its