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Surname Marczuk (Marczuk , Марчук ) , across the world, is a common cognomen. The cognomen Marczuk is characteristic of Eastern Europe, particularly Ukraine, where it is quite a common surname, Belarus, and Poland, where it is quite a rare surname. In absolute terms, it is the most numerous in Eastern Europe, particularly Ukraine, Russia, and Poland. Much less frequently, Marczuk is the forename as well as the last name.