Holy Roman Emperor Charles V, who was also known as Carlos I of Spain

Charles II of Spain - etc all kings Charles of Spain

Carlos, Infante of Spain, second surviving son of Philip III of Spain

Carlos, Duke of Madrid, Carlist pretender as Carlos VII

Alfonso Carlos, Duke of San Jaime, Carlist pretender

Archduke Karl Pius, Prince of Tuscany, leader of breakaway Carlist movement between 1943 and 1953 and a disputed pretender as Carlos VIII

Don Carlos, Prince of Asturias, eldest son of Philip II of Spain

Baltasar Carlos, Prince of Asturias, eldest son of Philip IV of Spain

Infante Carlos of Spain, Count of Molina, pretender as Carlos V (the first claimant king of Spanish Carlism) and the second surviving son of Charles IV of Spain

Carlos, Count of Montemolin, Carlist pretender as Carlos VI

Carlos Hugo, Duke of Parma, former Carlist Prince of Asturias