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Cognomen جاجو (Jaggu , Gago , جاجو ) , in the entire world, is a common surname. The cognomen جاجو is habitual in Nicaragua, where it is quite a common surname, Portugal, and Peru, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Spain, Argentina, and Peru. Also, جاجو is the forename as well as the last name.