Princess Olga of Hanover and Cumberland (; 11 July 1884 - 21 September 1958) was the youngest daughter of Ernest Augustus, Crown Prince of Hanover (1845-1923) and Princess Thyra of Denmark (1853-1933), the youngest daughter of Christian IX of Denmark (1818-1906) and Louise of Hesse-Kassel (1817-1898). Olga was a great-great-granddaughter of George III of the United Kingdom and Charlotte of Mecklenburg-Strelitz. Princess Olga resided with her family at Gmunden and remained unmarried throughout her life. In 1958, shortly before Olga's death, her nephew Ernest Augustus, Prince of Hanover, and his wife Princess Ortrud of Schleswig-Holstein-Sonderburg-Glücksburg named their daughter, born in 1958, Olga in her honour. Olga died of natural causes at her home, Hubertihaus, near Gmunden on 21 September 1958. Titles and styles *11 July 1884 - 21 September 1958: Her Royal Highness Princess Olga of Hanover, Duchess of Brunswick-Lüneburg Ancestry
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