Duke of Castro

• Alexander Farnese, Duke of Parma
• Castro (disambiguation)
• Castro (surname)
• Duchy of Castro
• Francis II of the Two Sicilies
• House of Bourbon-Two Sicilies
• House of Castro
• House of Farnese
• Odoardo Farnese, Duke of Parma
• Orazio Farnese, Duke of Castro
• Ottavio Farnese, Duke of Parma
• Pier Luigi Farnese, Duke of Parma
• Prince Alfonso, Count of Caserta
• Prince Carlo, Duke of Castro
• Prince Ferdinand Pius, Duke of Calabria
• Prince Ferdinand, Duke of Castro
• Prince Ranieri, Duke of Castro
• Ranuccio I Farnese, Duke of Parma
• Ranuccio II Farnese, Duke of Parma