Duchess Altburg of Oldenburg Duchess of Oldenburg (1903–2001) (1903–2001) Parents Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin Frederick Augustus II, Grand Duke of Oldenburg Children Wittekind, Prince of Waldeck and Pyrmont Alexandra Prinzessin zu Waldeck und Pyrmont Margarethe zu Waldeck und Pyrmont Ingrid Prinzessin zu Waldeck und Pyrmont Princess Guda of Waldeck and Pyrmont Siblings Alexandrine von Holstein-Gottorp Duchess Margarete of Oldenburg Ingeborg Alix von Oldenburg Duke Friedrich August of Oldenburg Duchess Sophia Charlotte of Oldenburg Nikolaus, Hereditary Grand Duke of Oldenburg Partners Josias, Hereditary Prince of Waldeck and Pyrmont