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.

[1] In 1482 he was captain of the papal army of Sixtus IV against the Duke of Calabria Alfonso II of Naples.

[1] Once free, he escaped an attack ordered by the Colonnas and took refuge in France, at the court of Louis XII.

[1] In 1511 his father-in-law, Pope Julius II, negotiated a peace with the Colonnas and recalled Gian Giordano to Italy.