Joan of Nassau-Saarbrücken German countess (1464-1521) (1464–1521) Parents Joanna of Loon-Heinsberg John II of Nassau-Saarbrücken Children John II of Simmern Siblings Elisabeth of Nassau-Saarbrücken (1459-1479) John Louis of Nassau-Saarbrücken Partners John I, Count Palatine of Simmern