Mieszko I of Poland husband from the monastery of Kalbe. They had three sons: After a struggle for power between Bolesław I and Oda with her minor sons (Bolesław's half-brothers), the eldest son of Mieszko I took control over all of his father's state and expelled his stepmother and her sons from Poland. Mieszko I of Poland Mieszko I (; – 25 May 992) was the ruler of the Polans from about 960 until his death. A member of the Piast dynasty, he was a son of the legendary Siemomysł, and a grandson of Lestek. He was the father of Bolesław I the Brave
Mieszko II the Fat which was given to their mother Viola as her . Mieszko II the Fat Mieszko II the Fat () ( – 22 October 1246) was a Duke of Opole-Racibórz from 1230 until his death, and Duke of Kalisz-Wieluń during 1234–1239 (with his brother as co-ruler). He was the eldest son of Duke Casimir I of Opole by his wife Viola, probably a Bulgarian lady. At the time of his father's death in 1230, Mieszko II and his younger brother Władysław were still minors; for this, the regency of the Duchy was taken by their mother and Henry I the Bearded,