Prince Sixtus Henry of Bourbon-Parma Prince Sixtus Henry of Bourbon-Parma Prince Sixtus Henry of Bourbon-Parma (; ; born 22 July 1940) is considered Regent of Spain by some Carlists who accord him the titles Duke of Aranjuez, Infante of Spain, and Standard-bearer of Tradition. Sixtus was born in Pau, Pyrénées-Atlantiques during the World War II Vichy regime of France, the second son of Prince Xavier of Bourbon-Parma (then Prince Regent, later Carlist pretender to the throne of Spain, later titular Duke of Parma) and his wife Madeleine de Bourbon-Busset. He belongs to a cadet branch of the former royal dynasty of France (and current dynasty
House of Bourbon a "commoner" (referring back to the Medieval origins of the Bourbon Dynasty's name and referring to Hugh Capet, founder of the Capetian Dynasty). Members of the House of Bourbon-Condé and its cadet branches, which never ascended to the throne, used the surname "de Bourbon" until their extinction in 1830. The daughters of Gaston, Duke of Orleans, were the first members of the House of Bourbon since the accession of Henry IV to take their surname from the appanage of their father (d'Orleans). Gaston died without a male heir; his titles reverted to the crown. It was given to his nephew,