The list includes all individuals who were first in line to the throne of Italy, either as heir apparent or as heir presumptive, since 1861. Those who actually succeeded to the throne are shown in bold.
Heirs to the throne +Heirs to the Italian throne Monarch Heir Relationshipto monarch Became heir(Date; Reason) Ceased to be heir(Date; Reason) Next in line of successionVittorio Emanuele IIPrince Umberto, Prince of PiedmontSon17 March 1861Father proclaimed king of Italy9 January 1878Father died, became king Prince Amedeo, Duke of Aosta, 1861–1869, brother Prince Vittorio Emanuele, Prince of Naples, 1869–1878, sonUmberto ISon9 January 1878Father became king29 July 1900Father assassinated, became king Prince Amedeo, Duke of Aosta, 1878–1890, uncle Prince Emanuele Filiberto, Duke of Aosta, 1890–1900, first cousin Prince Emanuele Filiberto, Duke of Aosta First cousin 29 July 1900 15 September 1904Son born to king Prince Amedeo, Duke of Apulia, sonPrince Umberto, Prince of PiedmontSon15 September 1904Born9 May 1946Father abdicated, became king Prince Amedeo, Duke of Aosta, 1931–1937, second cousin Prince Vittorio Emanuele, Prince of Naples, 1937–1946, son Umberto II Prince Vittorio Emanuele, Prince of Naples Son 9 May 1946Father became king 12 June 1946 Prince Aimone, Duke of Aosta, second cousin once-removed