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Cognomen 卡普 (Kup , Kapp , Capp ) , in all the world, is a common family name. The cognomen 卡普 is habitual in Estonia, where it is quite a common surname, Germany, where it is quite a rare surname, and South Africa. In absolute terms, this name is the most popular in the United States, Germany, and South Africa. Much less frequently, 卡普 is the forename as well as the last name.