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Surname Lesniak (Lesniak , Лесняк , Лесниак ) , in the entire world, is a common last name. The family name Lesniak is characteristic of Eastern Europe, particularly Poland, where it is quite a common surname, Belarus, where it is quite a rare surname, and Ukraine. Measured by absolute frequency, the name is most common in Poland, Russia, and the United States. Also, Lesniak is the forename as well as the last name.