Adelheid von Oldenburg Peerage person ID=6396 (1475–1513) Parents Adelheid von Tecklenburg Gerhard VI Children Dietrich IV, Herr von Plesse Siblings Christian of Oldenburg Elisabeth of Oldenburg Dietrich Oldenburg Otto Oldenburg Irmgard of Oldenburg John V Anna of Oldenburg Gerhard Oldenburg Adolph, Count of Oldenburg-Delmenhorst Hedwig Oldenburg Partners Dietrich III von Plesse