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Last name Karper (Carpa , Karper ) , across the world, is quite a rare surname. The family name Karper is habitual in Romania, where it is quite a rare surname, Netherlands, where it is a rare surname, and Bolivia. Not in comparison with a country's population, this name is the most popular in the United States, Romania, and Germany. Very seldom, Karper is the forename as well as the last name.