Sibylle Margarethe von Brieg (1620-1657) (1620–1657) Parents Dorothea Sibylle of Brandenburg John Christian of Brieg Children Sibylle, Gräfin von Dönhoff Władysław Denhoff Siblings August of Legnica Sophie Magdalene of Legnica-Brzeg George III of Brieg Louis IV of Legnica Christian, Duke of Brieg August of Brieg Zygmunt Piastowicz Partners Gerhard von Dönhoff