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Cognomen ชัยนาม (ชัยนาม , Jayanama , Chainam ) , in all the world, is quite a rare last name. The last name ชัยนาม is characteristic of Thailand, where it is quite a rare surname, the United States, where it is an extremely rare surname, and India. Much less frequently, ชัยนาม is the forename as well as the last name.