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Last name Bilek (Bilek , Bílek , Билек ) , all over the world, is a common surname. The family name Bilek is habitual in Czechia, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Austria. Measured by absolute frequency, this name is the most popular in Czechia, the United States, and Germany. Much less frequently, Bilek is the forename as well as the last name.