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 Duke Nikolaus, Hereditary Grand Duke of Oldenburg Duchess Sophia Charlotte of Oldenburg Duchess Ingeborg Alix of Oldenburg Duchess Alexandrine of Oldenburg Princess Altburg, Hereditary Princess of Waldeck and Pyrmont Siblings Duke Georg Ludwig of Oldenburg Partners Princess Elisabeth Anna of Prussia Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin
