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Surname Копецкий (Kopecký , Копецкий , Kopetsky ) , across the world, is quite a rare family name. The surname Копецкий is habitual in Czechia, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Austria, where it is a rare surname. Measured by absolute frequency, it is commonest in Czechia, the United States, and Slovakia. Much less frequently, Копецкий is the forename as well as the last name.