Marzio Mastrilli, Marquis of Gallo, was a Neapolitan nobleman, diplomat and statesman. The second son of Mario, Duke of Marigliano, and Giovanna Caracciolo di Capriglia, he was born at the castle of Ponticchio, near Nola. As per family custom, he received the secundogeniture of the small marquisate of Gallo. Only in 1813 did King Joachim Murat raise his title to Duke of Gallo and make it hereditary.