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Kryshtof Kosynsky (Polish: Krzysztof Kosiński, Ukrainian: Криштоф Косинський) (?–1593) was a Polish/Ukrainian nobleman from Podlachia. He was the hetman of the Zaporozhian Kozaks in 1586. He later served as the hetman of the registered Kozaks in the 1590s. He led a large Ukrainian peasant/Kozak rebellion against the Poles in 1591–1593. He was killed in 1593 as his armies besieged the city of Cherkasy.