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Last name Lejko (Lejko , Лейко ) , around the globe, is quite a rare cognomen. The last name Lejko is characteristic of Eastern Europe, particularly Belarus, where it is quite a rare surname, Slovakia, and Ukraine. Not in comparison with a country's population, it is commonest in Eastern Europe, particularly Ukraine, Russia, and Belarus. Very seldom, Lejko is the forename as well as the last name.