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Last name Bielak (Bielak , 比拉克 , Беляк ) , throughout the world, is a common cognomen. The cognomen Bielak is habitual in Eastern Europe, particularly Poland, where it is quite a common surname, Belarus, where it is quite a rare surname, and Slovakia. In absolute terms, the name is most common in Eastern Europe, particularly Poland, Russia, and Ukraine. Also, Bielak is the forename as well as the last name.