Matilda of Brandenburg, Duchess of Poland

Two of her brothers, Albert and Otto, died young and the eldest, Herman, inherited the whole paternal domains.

The other two sisters are Kunigunde, who died unmarried, and Judith, who married Rudolph I, Duke of Saxe-Wittemberg in 1303.

The marriage of Matilda's sister into the Silesian branch of the Piast dynasty probably was instrumental to her own future wedding.

Henry IV's previous marriage with the daughter of Duke Władysław of Opole (perhaps named Constance) ended either with her death[3] or her repudiation and exile to her homeland.

[4] According to other sources, the real reason around the disputed dismissal of the Opole princess was because Henry IV maintained an affair with Matilda and wanted to marry her.