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Surname Олейник (Olejnik , Олейник , Oliynyk , along with others...) , across the world, is a common cognomen. The family name Олейник is habitual in Eastern Europe, particularly Poland, where it is quite a common surname, Belarus, and Russia (explore the name in all countries). Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Russia, Poland, and Ukraine. Very seldom, Олейник is the forename as well as the last name.