Louis Alphonse, Duke of Anjou
Their father has conferred upon them the historic French titles of, respectively, Duke of Burgundy ("duc de Bourgogne"), and Duke of Berry ("duc de Berry"). (In Spain, the twins are "Don" Luis and "Don" Alfonso de Borbón Vargas). Prince Louis, as Legitimist Dauphin of France, is expected to succeed his father as head of the French royal house, the senior Bourbon/Capetian line, in Legitimist reckoning. However, under Spanish law, and assuming Felipe VI does not in future father a son, the Spanish crown will be inherited by his elder daughter Leonor, Princess of Asturias, who will become queen regnant, and if Felipe does have a son, that son will inherit the Spanish throne regardless of the genealogical seniority of the Anjou branch. Louis and Alphonse were baptised on 5 September 2010 at St Peter's Basilica in Vatican City. Louis' godparents were Arancha Martínez-Bordíu and Francisco D'Agostino and Alphonse's were Amparo Corell de Trenor, and Lorenzo Perales.
Descendants of Louis XIV of France
However, if a non-Salic primogeniture is followed, the eldest surviving descendant, in other words, the heir-general of Louis XIV is the present Duke of Calabria. With the death of the Madame Royale, daughter of Louis XVI, the direct line of the French royal family became extinct. At her death, the heir-general of Louix XIV was also its heir-male – Henri, Count of Chambord ("Henri V"), who was the nephew of her husband and first cousin, Louis Antoine, Duke of Angoulême. However, with his death, the titles split, with the French succession rights passing to the descendants of Philip V of Spain and the status of heir-general passing to his sister, Louise Marie Thérèse d'Artois, who married Charles III, Duke of Parma, himself a direct descendant of Philip V of Spain. It is through this descent that the Duke of Calabria holds the designation of heir-general of Louis XIV.