Ермак Тимофеевич
The Ushkuiniks were medieval Russian Novgorodian river pirates from the tenth to fourteenth centuries, a Slavic version of the Vikings, through fighting, killing, and robbery. In the sixteenth-century reign of Tsar Ivan the Terrible, the legendary explorer and soldier Yermak Timofeyevich, was a Russian Cossack river pirate along the Volga or possibly Don River. Yermak was later pardoned for his crimes and became the "Conqueror of Siberia".