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.
Louis XIII of France
Born at the Château de Fontainebleau, Louis XIII was the oldest child of King Henry IV of France and his second wife Marie de' Medici. As son of the king, he was a Fils de France ("son of France"), and as the eldest son, Dauphin of France. His father Henry IV was the first French king of the House of Bourbon, having succeeded his ninth cousin, Henry III of France (1574–1589), in application of Salic law. Louis XIII's paternal grandparents were Antoine de Bourbon, duc de Vendôme, and Jeanne d'Albret, Queen of Navarre. His maternal grandparents were Francesco I de' Medici, Grand Duke of Tuscany, and Joanna of Austria, Grand Duchess of Tuscany. Eleonora de' Medici, his maternal aunt, was his godmother. As a child, he was raised under the supervision of the royal governess Françoise de Montglat.