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Surname Martyniuk (Martyniuk , Мартынюк , Мартинюк ) , globally, is a common last name. The surname Martyniuk is habitual in Ukraine, where it is quite a common surname, Lithuania, and Belarus. In absolute terms, it is the most numerous in Eastern Europe, particularly Ukraine, Russia, and Belarus. Much less frequently, Martyniuk is the forename as well as the last name.