| Prince Ferdinand | |
| Full Name: | Ferdinando Maria Andrea Alfonso Marcus di Borbone |
| Duke of Castro | |
| Succession: | Head of the House of Bourbon-Two Sicilies (disputed) |
| Reign-Type: | Tenure |
| Reign: | 13 January 1973 – 20 March 2008 |
| Predecessor: | Prince Ranieri |
| Successor: | Prince Carlo |
| Issue: | Princess Beatrice Princess Anne Prince Carlo, Duke of Castro |
| House: | Bourbon-Two Sicilies |
| Father: | Prince Ranieri, Duke of Castro |
| Mother: | Countess Maria Carolina Zamoyska |
| Birth Date: | 28 May 1926 |
| Birth Place: | Podzamcze, Poland |
| Death Place: | Draguignan, France |
| Religion: | Roman Catholic |
Prince Ferdinand of Bourbon-Two Sicilies, Duke of Castro (Ferdinando Maria Andrea Alfonso Marcus; 28 May 1926 - 20 March 2008) was a claimant to the headship of the former Royal House of the Two Sicilies.
Ferdinand was born in Podzamcze, the son of Prince Ranieri, Duke of Castro, and his wife Countess Maria Carolina Zamoyska. His parents were first cousins, as his grandmothers were sisters. His paternal grandparents were also first cousins. He lived most of his life in France and was the first member of the Two Sicilian royal family to serve in the French Armed Forces.
Ferdinand succeeded as head of the House of the Bourbon-Two Sicilies on his father's death in 1973, having carried out the functions associated with the headship of the family since 1966. He was Sovereign of the Sacred Military Constantinian Order of Saint George and the Royal Order of Francis I. He was decorated with several dynastic and state orders.[1]
Ferdinand died in France on 20 March 2008.[2]
Ferdinand was married in Giez on 23 July 1949 to Chantal de Chevron-Villette (1925–2005), and they had three children:
As the marriage was initially considered morganatic, Ferdinand’s children were considered ineligible for the throne of Two-Scillies. Following his father's assumption as head of the house, however, he retroactively declared Ferdinand's marriage dynastic and his children eligible for the throne. This was contested by the Calabrian pretenders until 2014. [3]
Panama: Grand Cross of the Order of Vasco Núñez de Balboa, Special Class[5]