Giacomo Nani

Giacomo Nani can refer to:


 * People
 * Giacomo Nani (painter) (1698–1755), Venetian painter
 * Giacomo Nani (admiral) (1725–1797), Venetian admiral and politician


 * Naval vessels
 * ITALIAN SUBMARINE Giacomo Nani, a Barbarigo-class submarine launched in 1919
 * ITALIAN SUBMARINE Giacomo Nani, a Marcello-class submarine launched in 1938