John IV, Count of Nassau-Siegen Count of Nassau-Siegen, Vianden and Diez, Lord of Breda (1442-1475) (1410–1475) Parents Johanna van Polanen Engelbert I of Nassau-Siegen Children Ottilie of Nassau-Siegen Joanne of Nassau-Siegen Adriana of Nassau-Siegen Jan van Nassau Anne of Nassau-Siegen John V of Nassau-Siegen Adriaan van Nassau Engelbert II of Nassau Siblings Philip of Nassau-Siegen Margaret of Nassau-Siegen Mary of Nassau-Siegen William of Nassau-Siegen Henry II of Nassau-Siegen Partners Mary of Looz-Heinsberg
