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Cognomen Lesko (Lesko , Leskó , Лесько ) , in all the world, is a common surname. The cognomen Lesko is habitual in Eastern Europe, particularly Slovakia, where it is quite a common surname, Hungary, and Belarus, where it is quite a rare surname. Measured by absolute frequency, the name is most common in the United States, Ukraine, and Slovakia. Much less frequently, Lesko is the forename as well as the last name.