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Cognomen Jap (Jap , Ajap , Яп ) , throughout the world, is a common family name. The cognomen Jap is habitual in Suriname, where it is quite a common surname, Indonesia, where it is quite a rare surname, and Malaysia. Measured by absolute frequency, it is commonest in Indonesia, India, and Malaysia. Likewise, Jap is the forename as well as the last name.