1. King Carlo di Borbone, King of Naples and Sicily (ruled 1731-1759)

2. King Ferdinando I of the Two Sicilies (1759-1825)

3. King Francesco I of the Two Sicilies (1825-1830)

4. King Ferdinando II of the Two Sicilies (1830-1859)

5. King Francesco II of the Two Sicilies (1859-1894)

6. Prince Alfonso, Count of Caserta, later Duke of Castro (1894-1931)

7. Prince Ferdinando Pio, Duke of Castro (1931-1960)

8. Prince Ranieri, Duke of Castro (1960-1966)

9. HRH Prince Ferdinando of Bourbon Two Sicilies, Duke of Castro (1966-2008)

10. HRH Prince Carlo of of Bourbon Two Sicilies Duke of Castro (from 2008)