Don Carlos María Alfonso Marcelo de Borbón-Dos Sicilias y Borbón-Parma, Infante of Spain, Duke of Calabria (16 January 1938 – 5 October 2015) was, at his death, the last male infante of Spain during the reigns of his cousins King Juan Carlos I and King Felipe VI.
Additionally, he was also one of two claimants to the headship of the dynasty which ruled the Kingdom of the Two Sicilies prior to its incorporation into the Kingdom of Italy in 1861, in which capacity he was also the Grand Master of one of the three branches of the Sacred Military Constantinian Order of Saint George.
