Gaudemunda of Lithuania
Gaudemunda Sophia of Lithuania was the daughter of Traidenis, Grand Duke of Lithuania. In 1279, she married Duke of Masovia Bolesław II of the Piast dynasty. He was the son of Ziemowit I, Prince of Masovia, and Pereyaslava, daughter of Daniel of Galicia of the Rurik dynasty.
Her husband united the Duchy of Masovia and then divided it between their sons, who were:
- Siemowit II
- *Received the Duchy of Rawa
- Trojden I
- *Received the Duchy of Czersk and Warsaw
- *Married his cousin Maria, daughter of George I of Halych
- *Great-grandfather of Cymburgis of Masovia
- Wenceslaus
- *Received the Duchy of Płock