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Family name Kohan (Kohan , 科恩 , Кохан ) , around the globe, is a common surname. The family name Kohan is habitual in Belarus, where it is quite a common surname, Ukraine, and Paraguay, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Eastern Europe, particularly Ukraine, Russia, and Belarus. Likewise, Kohan is the forename as well as the last name.