Zynoviy Bohdan Khmelnytsky (Ruthenian: ?????? ?????? ?????i??i?; modern Ukrainian: ?????? ??????? ?????????? ????????????, romanized: Bohdan Zynoviy Mykhailovych Khmelnytsky; c.?1595 – 6 August 1657) was a Ukrainian Hetman of the Zaporozhian Host, then in the Polish Crown of the Polish–Lithuanian Commonwealth (now part of Ukraine).
He led an uprising against the Commonwealth and its magnates (1648–1654) that resulted in the creation of a state led by the Cossacks.
In 1654, he concluded the Treaty of Pereyaslav with the Russian Tsardom and thus allied the state with Russia.
Source: Jerzy Malinowski (1993). Where East meets West: portrait of personages of the Polish-Lithuanian Commonwealth, 1576-1763. National Museum in Warsaw. ISBN 83-71000-88-X, p. 155 License: CC-PD-Mark PD-Art (PD-old-100)