John III, Count of Oldenburg German aristocrat (1295–1344) Parents Hedwig von Diepholz Elisabeth von Braunschweig-Lüneburg John II of Oldenburg Children Otto Oldenburg Christian V of Oldenburg Wilhelm of Oldenburg John IV, Count of Oldenburg Siblings Conrad I, Count of Oldenburg Christian IV, Count of Oldenburg Agnes of Oldenburg Maurice of Oldenburg Richarda of Oldenburg Gisela of Oldenburg Partners Mechtilde von Bronckhorst