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Surname Kozub (Kozub , Козуб ) , throughout the world, is a common family name. The family name Kozub is characteristic of Eastern Europe, particularly Ukraine, where it is quite a common surname, Poland, where it is quite a rare surname, and Slovakia. Measured by absolute frequency, the name is most common in Eastern Europe, particularly Ukraine, Russia, and Poland. Likewise, Kozub is the forename as well as the last name.