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Surname Stefanek (Stefanek , Štefanek , Štefánek ) , across the world, is quite a rare family name. The cognomen Stefanek is characteristic of Croatia, where it is quite a rare surname, Slovakia, and Czechia. Measured by absolute frequency, the name is most common in Eastern Europe, particularly Poland, Slovakia, and Czechia. Also, Stefanek is the forename as well as the last name.