Bolesław I, Duke of Cieszyn Duke of Bytom, Cieszyn, Głogów, Ścinawa and Siewierz (1363–1431) Parents Elżbieta of Bytom-Koźle Przemyslaus I Noszak, Duke of Cieszyn Children Wenceslaus I, Duke of Cieszyn Przemysław II, Duke of Cieszyn Władysław of Głogów Bolesław II, Duke of Cieszyn Alexandra of Teschen Siblings Przemysław of Oświęcim Anna of Cieszyn Margaret of Cieszyn Partners Margareta von Troppau-Ratibor Euphemia of Masovia