Kateřina Opavská Duchess consort of Żagań (1450–1505) Parents William, Duke of Opava Salome of Častolovice Children Jadwiga von Sagan und Glogau Anna of Sagan Margareta of Sagan Siblings Anna Opavská Wenzel III. Przemko III, Duke of Opava Frederick, Duke of Opava Partners Jan II the Mad, duke of Żagań