Gaudemunda of Lithuania

Gaudemunda Sophia of Lithuania (also Gaudimantė; c. 1260 – 1288/1313) was the daughter of Traidenis, Grand Duke of Lithuania (c. 1270–1282). In 1279 she married Duke of Masovia Bolesław II (c. 1254–1313) 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: