Soběslav or Soběbor (c. 950 – 1004) was the brother of Saint Adalbert of Prague, son of Střezislava and Slavník and a friend of Polish king, Boleslaus the Brave. He was equally powerful as the Přemyslid dynasty in his time, for example, he was able to mint his own money. When he was in Germany, the Přemyslids massacred his family. Then Soběslav went to Boleslav the Brave to obtain sanctuary in Poland. In 1004, Soběslav led the Charváts tribe and died on a bridge over the Vltava river in Prague, when Polish troops tried to occupy the city.