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Last name Szymczak (Szymczak , Шимчак ) , across the world, is a common family name. The surname Szymczak is characteristic of Poland, where it is quite a common surname, Ireland, where it is quite a rare surname, and France, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Poland, Germany, and the United States. Likewise, Szymczak is the forename as well as the last name.