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Family name Banaszek (Banaszek , Банашек ) , in all the world, is quite a rare surname. The cognomen Banaszek is habitual in Poland, where it is quite a rare surname, Ireland, where it is a rare surname, and Norway. Measured by absolute frequency, this name is the most popular in Poland, the United States, and Germany. More prevalently, Banaszek is the forename as well as the last name.