Ferrante Orsini, 10th Duke of Gravina 1623 Gravina - 24 Aug 1658 Napoli (1623–1658) Parents Dorotea Orsini Pietro Francesco Orsini, 9th Duke of Gravina Children Domenico Orsini, 11th Duke of Gravina Benedict XIII Siblings Costanza Orsini Partners Giovanna Frangipani della Tolfa