Gian Giacomo Bruni (died 1507) was a Roman Catholic prelate who served as Bishop of Nepi e Sutri (1506âÂÂ1507).
On 6 February 1506, Gian Giacomo Bruni was appointed during the papacy of Pope Julius II as Bishop of Nepi e Sutri. He served as Bishop of Nepi e Sutri' until his death in 1507.