People Duke Nikolaus, Hereditary Grand Duke of Oldenburg Head of House of Oldenburg (1931-1970)10 August 1897 – 3 April 1970 Frederick Augustus II, Grand Duke of Oldenburg16 November 1852 – 24 February 1931 Duke Nikolaus, Hereditary Grand Duke of Oldenburg10 August 1897 – 3 April 1970 ParentsFrederick Augustus II, Grand Duke of Oldenburg16 November 1852 – 24 February 1931SiblingsDuchess Sophia Charlotte of Oldenburg2 February 1879 – 29 March 1964 From Wikipedia and Wikidata (public domain), updated daily.
