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Cognomen Duz (Duz , Дузь , דוס ) , around the globe, is quite a rare surname. The cognomen Duz is habitual in Ukraine, where it is quite a rare surname, Turkey, and Estonia, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Turkey, Ukraine, and Russia. Much less frequently, Duz is the forename as well as the last name.