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.
Duke of Bourbon
Therefore, the heir male of the Bourbon family belonged to the House of Bourbon-Vendôme from 1527 onwards, in the person of Charles de Bourbon, Duke of Vendôme until he died in 1537. Charles remained loyal to the king, even though Francis I had denied him the Bourbon inheritance and the inheritance of his wife, the sister of Charles IV, Duke of Alençon. Charles's son, Antoine, would become King of Navarre, and his grandson, Henry, would become King of France. All of the present-day family members descend from him. As the new reigning dynasty, the House of Bourbon-Vendôme was simply called the House of Bourbon.