Background
She was the second daughter of Otto V the Long, Margrave of Brandenburg-Salzwedel, by his wife Judith of Henneberg, daughter of Count Herman I of Henneberg and heiress of Coburg and Schmalkalden.
She was the second daughter of Otto V the Long, Margrave of Brandenburg-Salzwedel, by his wife Judith of Henneberg, daughter of Count Herman I of Henneberg and heiress of Coburg and Schmalkalden.
By her two marriages she was Duchess of Świdnica and Koźle-Bytom-Siewierz. Family Beatrice"s young sister Matilda married in 1287/88 with Henry IV Probus, Duke of Wrocław and High Duke of Poland. The other two sisters are Kunigunde, who died unmarried, and Judith, married in 1303 with Rudolf I, Duke of Saxe-Wittenberg.
lieutenant is probable that the wedding of Beatrice into the Silesian branch of the Piast dynasty was instrumental to Matilda"s future wedding with Henry IV. First Marriage Second Marriage.