Ferdinando d' Aragona y Guardato, 1st Duke of Montalto [SEP] father
Ferdinando d'Aragona y Guardato, 1st Duke of Montalto
Ferdinando d'Aragona y Guardato, 1st Duke of Montalto (before 1494–1542) was the eldest bastard son of king Ferdinand I of Naples and Diana Guardato, one of his mistresses. 
The addition "Montalto de Aragón" is in remembrance of his grandfather, Alfonso V of Aragon.
Marriages and issue.
Ferdinando was the ninth child of Ferdinand I of Naples. He first married Anna Sanseverino. The marriage was without issue.
He then married, Castellana de Cardona
Diana Guardato
Diana Guardato was a member of the aristocratic Patrician Guardato family, and had three children with King Ferdinand I:
- Ferdinando d' Aragona y Guardato, 1st Duke of Montalto, who married 1st, Anna Sanseverino, 2nd, Castellana de Cardona
- Maria d'Aragona, who married Antonio Todeschini Piccolomini, Duke of Amalfi, a nephew of Pope Pius II and brother of Pope Pius III.
- Giovanna d' Aragona, who married Leonardo della Rovere, Duke of Arce and Sora, a nephew of