He was a son of the Siemomysł, the ruler of Polans, and grandson of the Lestek, she was also a father of: Boleslaw I of Poland, the first king of Poland, Mieszko Mieszkowic, Świętosława, the queen of the Vikings and the Granfather of Cnut the Great, the king of the vikings, Mieszko Mieszkowic, Lambert Mieszkowic and Vladivoj - the Duke of Bohemia