Prince Vittorio Emanuele of Savoy, Prince of Naples, was the only son of Umberto II, the last King of Italy, and Marie-José of Belgium. Vittorio Emanuele also used the title Duke of Savoy and claimed the headship of the House of Savoy. These claims were disputed by supporters of his third cousin, Prince Amedeo, Duke of Aosta, and later by Amedeo's son, Aimone.

Umberto II was the last King of Italy. Umberto's reign lasted for 34 days, from 9 May 1946 until his formal deposition on 12 June 1946, although he had been the de facto head of state since 1944. Due to his short reign, he was nicknamed the May King.