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Surname Omelianiuk (Omelianiuk , Омельянюк , Омелянюк ) , all over the world, is quite a rare last name. The cognomen Omelianiuk is habitual in Eastern Europe, particularly Belarus, where it is quite a rare surname, Ukraine, and Russia, where it is a rare surname. Much less frequently, Omelianiuk is the forename as well as the last name.