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Cognomen Kostka (Kostka , Костка ) , in all the world, is a common last name. The family name Kostka is characteristic of Eastern Europe, particularly Czechia, where it is quite a common surname, Slovakia, and Poland, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Poland, Czechia, and Germany. Also, Kostka is the forename as well as the last name.