Background
Ortrud was the daughter of Prince Albrecht of Schleswig-Holstein-Sonderburg-Glücksburg (1863–1948) and his second wife, Princess Hertha of Ysenburg and Büdingen (1883–1972), daughter of Bruno, 3rd Prince of Ysenburg and Büdingen.
Ortrud was the daughter of Prince Albrecht of Schleswig-Holstein-Sonderburg-Glücksburg (1863–1948) and his second wife, Princess Hertha of Ysenburg and Büdingen (1883–1972), daughter of Bruno, 3rd Prince of Ysenburg and Büdingen.
Ortrud married Prince Ernest Augustus of Hanover (later Ernest Augustus, Prince of Hanover, Duke of Brunswick) on 31 August 1951 at Marienburg Castle, Nordstemmen, Hanover, Germany in a civil marriage ceremony. Titles and styles "These are traditional, rather than legal, styles and titles sometimes used by courtesy," this phrase inserted per metal–oxide–semiconductor/Biographies agreement. 19 December 1925 – 31 August 1951: Her Highness Princess Ortrud of Schleswig-Holstein-Sonderburg-Glücksburg.
31 August 1951 – 30 January 1953: Her Royal Highness Princess Ortrud of Hanover.
30 January 1953 – 6 February 1980: Her Royal Highness The Princess of Hanover, Duchess of Brunswick. Honours = National dynastic honour = Foreign honours.