Gian Giordano Orsini | |
|---|---|
| IV Lord of Bracciano | |
 Arms of Orsini of Bracciano family | |
| Reign | 8 January 1497–12 October 1517 |
| Predecessor | Gentile Virginio Orsini |
| Successor | Girolamo Orsini |
| Born | c. 1460 Bracciano |
| Died | 1517 Vicovaro |
| Noble family | Orsini |
| Spouse(s) |
Maria Cecilia of Naples
(m. 1486) |
| Issue | First marriage Napoleone Orsini Francesca Orsini Carlotta Orsini Second marriage Giulia Orsini Giulio Orsini Francesco Orsini Girolamo Orsini, V Lord of Bracciano Clarice Orsini |
| Father | Gentile Virginio Orsini |
| Mother | Isabella Orsini |
Gian Giordano Orsini, IV Lord of Bracciano (c. 1460–1517) was an Italian nobleman and condottiero. He married Felice della Rovere and was the son-in-law of Pope Julius II.