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 Philip, Duke of Edinburgh in male line to the Danish House of Glücksburg, originally a cadet branch of the House of Oldenburg, which held several thrones and provided consorts to rulers of Russia and Great Britain in the 19th and 20th centuries. In 1993, scientists were able to confirm the identity of the remains of several members of Empress Alexandra of Russia's family, more than seventy years after their massacre in 1918, by comparing their mitochondrial DNA to living matrilineal relatives, including Prince Philip, her maternal grandnephew. Philip, Alexandra and her children are all descended from Princess Alice of the United Kingdom, the daughter