Prince Jean, Duke of Guise Prince Jean, Duke of Guise Prince Jean of Orléans, Duke of Guise (Jean Pierre Clément Marie; 4 September 1874 – 25 August 1940), was the son of Prince Robert, Duke of Chartres (1840–1910), grandson of Prince Ferdinand Philippe and great-grandson of Louis Philippe I, King of the French. His mother was Françoise of Orléans, daughter of François, Prince of Joinville, and Princess Francisca of Brazil. Upon the death of his cousin and brother-in-law Philippe, Duke of Orléans, claimant to the throne of France as "Philip VIII", the Duke of Guise became, at least for his Orleanist and Unionist supporters, titular
Prince William Henry, Duke of Gloucester and Edinburgh House in London in 1805 and was succeeded as duke by his son William Frederick, who went on to marry his cousin Princess Mary in 1816, meaning that he and Sophia then received the style of Royal Highness. His peerages were gazetted on 17 November 1764. William was granted use of the arms of the kingdom, differenced by a "label argent of five points, the centre bearing a fleur-de-lys azure, the other points each bearing a cross gules". Prince William Henry, Duke of Gloucester and Edinburgh Prince William, Duke of Gloucester and Edinburgh, (William Henry; 25 November 1743 – 25