Richarda of Oldenburg Peerage person ID=8320 Parents Hedwig von Diepholz John II of Oldenburg Children Gisela von Plesse Johann, Herr von Plesse Siblings Conrad I, Count of Oldenburg Agnes of Oldenburg Maurice of Oldenburg Gisela of Oldenburg Christian IV, Count of Oldenburg John III, Count of Oldenburg Partners Gottschalk von Plesse