Henry II the Pious
Anna's paternal grandparents were, Henry II the Pious and his wife, Anna of Bohemia. Anna's maternal grandfather was, Władysław Odonic, King of Poland. Anna's siblings included: Henry III, Duke of Silesia-Glogau; successor to their father, Euphemia of Glogau; she was married to Albert I of Gorizia, Konrad II the Hunchback and Przemko of Ścinawa; he was killed in battle.