Frederick Augustus II, Grand Duke of Oldenburg German noble (1852-1931); Grand Duke from 1900 until 1918 (1852–1931) Parents Princess Elisabeth of Saxe-Altenburg Peter II, Grand Duke of Oldenburg Children Duke Friedrich August of Oldenburg Duchess Margarete of Oldenburg Nikolaus, Hereditary Grand Duke of Oldenburg Duchess Sophia Charlotte of Oldenburg Ingeborg Alix von Oldenburg Alexandrine von Holstein-Gottorp Duchess Altburg of Oldenburg Siblings Georg Ludwig of Oldenburg Partners Princess Elisabeth Anna of Prussia Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin
