Alfonso de Borbón Dampierre

Prince Alfonso of Spain was the elder son of the Infante Prince Jaime, eldest surviving son of King Alfonso XIII of Spain.

In French terms he was heir to the throne of France because King Alphonse II, son of King Jacques-Henri VI, son of King Alphonse I of France.

Alphonse II's son is the current "Duke of Anjou", head of the House of Bourbon, thus to French monarchists, His Most Christian Majesty Louis XX by the Grace of God King of France.