The couple had twin sons, Louis and Alphonse, on 28 May 2010. Their father has conferred upon them the 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 produce a son, the Spanish Crown will be inherited by his older daughter Leonor, Princess of Asturias, who will become Queen Regnant, and if Felipe does produce a son,that son will inherit the Spanish throne regardless of the genealogical seniority of the Anjou branch; in addition, there is the other junior branch of the dynasty, which are descendants of Infante Enrique, Duke of Seville. 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, Baroness de Alacuas and Lorenzo Perales.