Fulco VIII, Prince Ruffo di Calabria, 6th Duke of Guardia Lombarda (Naples 12 August 1884 – Ronchi di Apuana 23 August 1946) was an Italian World War I flying ace, senator under the fascist regime of Mussolini in World War II for which he was convicted. He was also posthumous father-in-law of King Albert II of the Belgians, and grandfather of King Philippe of Belgium.