Career
Olga was a great-great-granddaughter of George III of the United Kingdom (1738–1820) and Charlotte of Mecklenburg-Strelitz (1744–1818). 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
11 July 1884 - 28 March 1919: Her Royal Highness Princess Olga of Hanover and Cumberland, Duchess of Brunswick-Lüneburg
official in Great Britain: Her Highness Princess Olga of Cumberland.