Princess Helene of Waldeck and Pyrmont Hereditary Grand Duchess of Oldenburg (1899–1948) (1899–1948) Parents Princess Bathildis of Schaumburg-Lippe Friedrich, Prince of Waldeck and Pyrmont Children Duchess Rixa of Oldenburg Duke Egilmar of Oldenburg Duchess Altburg of Oldenburg Duke Johann of Oldenburg Duchess Eilika of Oldenburg Huno Herzog von Oldenburg Duke Friedrich August of Oldenburg Duke Peter of Oldenburg Anton-Günther, Duke of Oldenburg Siblings Prince Georg Wilhelm of Waldeck and Pyrmont Josias, Hereditary Prince of Waldeck and Pyrmont Maximilian of Waldeck and Pyrmont Partners Nikolaus, Hereditary Grand Duke of Oldenburg
