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Around the globe, Leszek (Leszek , Лешек , Лесзек ) is a common boy's forename. The given name Leszek is habitual in Poland, where it is quite a common male name, Gabon, where it is quite a rare male name, and Iceland. Not in comparison with a country's population, it is the most numerous in Poland, Germany, and the United States. More prevalently, Leszek is the last name as well as the forename.
Leszek is also a name for the fictitious and mythical characters: Leszek Retman .