Bolko IV of Opole Silesian duke (1360–1437) Parents Anna of Oświęcim Bolko III of Strzelce Children Nicholas I of Opole Margareta of Opole Bolko V the Hussite Jan I of Opole Siblings Jan Kropidło Bernard of Niemodlin Henry II of Niemodlin Anna ks. Piastówna-Śląska Partners Margareta of Görz