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Family name Knysz (Knysz , Knish , קניש ) , in the entire world, is quite a common surname. The surname Knysz is characteristic of Ukraine, where it is quite a common surname, Poland, where it is a rare surname, and Israel. In absolute terms, it is commonest in Ukraine, the United States, and Poland. Very seldom, Knysz is the forename as well as the last name.