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Cognomen Koper (Koper , كوبر , Cofre ) , in the entire world, is a common family name. The surname Koper is habitual in Chile, where it is quite a common surname, Poland, and Netherlands, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Chile, Poland, and Argentina. Also, Koper is the forename as well as the last name.