Nicholas I, Duke of Troppau Duke of Opava (c.1255–1318) (1255–1318) Parents Agnes of Kuenring Ottokar II of Bohemia Children Wenceslaus of Opava John of Opava Nicholas II, Duke of Opava Siblings Elisabeth, daughter of Ottokar II Wenceslaus II of Bohemia Agnes of Bohemia Kunigunde of Bohemia Agnes, daughter of Ottokar II Jan Markéta Partners Adelaide of Habsburg