Joan of Saarbrücken German countess (d. 1381) Parents Ghislette of Bar John II of Saarbrücken Children Johannetta of Nassau-Weilburg Schonetta of Nassau-Weilburg Agnes of Nassau-Weilburg John of Nassau-Weilburg Joan of Nassau-Weilburg Philip I of Nassau-Weilburg Margaret of Nassau-Weilburg Partners John I of Nassau-Weilburg