Augustus, Grand Duke of Oldenburg German duke (1783-1853) (1783–1853) Parents Duchess Frederica of Württemberg Peter I of Oldenburg Children Duke Elimar of Oldenburg Peter II, Grand Duke of Oldenburg Duke Nikolaus of Oldenburg Amalia of Oldenburg Frederika of Oldenburg Duke Alexander of Oldenburg Siblings Duke George of Oldenburg son1 von Holstein-Gottorp Partners Princess Ida of Anhalt-Bernburg-Schaumburg-Hoym Princess Adelheid of Anhalt-Bernburg-Schaumburg-Hoym Princess Cecilia of Sweden