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 Croÿ
Another son, Auguste de Croÿ, 9th Duke of Croÿ, better known as "Le Bel Auguste" (1765–1822), was mediatized upon the demise of the Holy Roman Empire in his capacity as sovereign prince of Dülmen. When the Bourbons were restored to the throne of France, Auguste was made a peer of France. From three of Auguste's sons - Alfred, Ferdinand and Philipp Franz - descend the three extant branches of the House of Croÿ, residing in Germany and France. 
On 27 October 1913, Karl Rudolf, 13th Duke of Croÿ, married Nancy Leishman, daughter of Pittsburgh industrialist John George Alexander Leishman, United States Ambassador to Germany and former president of Carnegie Steel. In 1974 Karl Rudolf died and was succeeded by his son Carl (d. 14 June 2011), 14th Duke of Croÿ; Carl was married to Princess Gabriele, daughter of Crown Prince Rupprecht of Bavaria. Their eldest son, Rudolf, the 15th and current Duke of Croÿ, married Alexandra Miloradovich; they had six children. Duchess Alexandra died on September 23, 2015; her funeral took place at St Jakobus Kirche in Dülmen on October 3, 2015. The Duke and his family live at their "Haus Merfeld" estate near Dülmen.
Georges Martin. "Histoire et Généalogie Maison de Croÿ". HGMC, 2002.