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.
House of France
Since 1733, all legitimate male Capetians were of the House of Bourbon, of the Vendôme branch, descended from Charles, Duke of Vendôme. The descendants of Charles (themselves from the Dukes of Bourbon and, by them, from the youngest son of St. Louis), then became the only surviving legitimate branch of the Capetian dynasty. The House of Bourbon-Busset form, indeed, the elder branch, but are not considered dynasts of the House of Bourbon (for they descend through what is considered an illegitimate line). These are the only surviving Bourbons who are not descended in male line from Henry IV. Charles' eldest son Antoine, King of Navarre, was the ancestor of the royal dynasties of France and Spain, and of the House of Orléans, while his youngest son Louis, Prince of Condé (1530–1569), was the ancestor of the House of Condé. A cadet branch of the Condés was the House of Conti, who in male line descended of Henri, Prince of Condé (1588–1646). Both Condés and Contis were ranked as Prince du sang.