Umberto II of Italy
Louis of Lorraine (7 December 1641 – 13 June 1718) was the Count of Armagnac from his father's death in 1666. The "Grand Squire of France", he was a member of a cadet branch of the House of Guise, itself a cadet branch of the sovereign House of Lorraine. His descendants include Albert II, Prince of Monaco, Umberto II of Italy, and Diana Álvares Pereira de Melo, 11th Duchess of Cadaval.