Queen Louise of Sweden, formerly Princess Louise of Battenberg, arriving in London airport in 1953 Keystone-France/Getty Images Princess Louise of Battenberg came from one of Europe's most noble families: her great-grandmother was Queen Victoria; her brother, Louis, was created Earl Mountbatten of Burma, and would one day become ‘honorary grandfather’ to King Charles; her sister, Alice, was mother to Prince Philip. Princess Louise grew up at the sprawling Schloss Heiligenberg in the Grand Duchy of Hesse, and was known as Lady Louise Mountbatten when her father, Prince Louis, was created the first Marquess of Milford Haven by George V in 1917.