Louis Alphonse, Duke of Anjou
Louis Alphonse was born in Madrid, the second son of Alfonso de Borbón, Duke of Anjou and Cádiz, and of his wife María del Carmen Martínez-Bordiú y Franco, eldest granddaughter of Francisco Franco. Alfonso was at that time the dauphin (using "Duke of Bourbon" as title of pretence) according to those who supported the claim of his father, Infante Jaime, Duke of Segovia to the French throne. On 20 March 1975, the Infante Jaime ("Henri VI" by Legitimist reckoning) died. Alfonso then asserted his claim to be both Head of the House of Bourbon and Legitimist claimant to the throne of France and the Co-Principality of Andorra. As such, he took the title "Duke of Anjou", and on 19 September 1981 gave Louis Alphonse the title Duke of Touraine.
Imperial Highness
Today, the style has mainly fallen from use with the exception of the . In the past, the style has been applied to more senior members of imperial dynasties, including the French, Turkish, Russian, and Ethiopian imperial houses, among many others. Archdukes of Austria from the Habsburg dynasty traditionally hold the style of Imperial and Royal Highness (), with the "Royal" signifying their status as Princes of Hungary. These styles have been abrogated but are often given out of courtesy. Some members of the royal family of Belgium descending from the Habsburgs do hold it as an official style (the "and Royal" might here possibly be read as referring as well to Belgium). Members of the British Royal Family, theoretically, as the Imperial Family of British India, could have used the title, but did not.