Soběslav I, Duke of Bohemia
Soběslav I (also "Sobeslaus"; c. 1075 – 14 February 1140) was Duke of Bohemia from 1125 until his death. He was a member of the Přemyslid dynasty, the youngest son of Vratislaus II (d. 1092), by his third wife Świętosława of Poland.