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Cognomen Knez (نيز , ネス , Knez ) , around the globe, is quite a rare last name. The cognomen Knez is habitual in Sierra Leone, where it is quite a rare surname, Czechia, and Bolivia, where it is a rare surname. Measured by absolute frequency, it is commonest in the United States, Sierra Leone, and Czechia. Very seldom, Knez is the forename as well as the last name.