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Cognomen Chanai (ไฉน , Chanai , ชนัย ) , all over the world, is quite a rare last name. The family name Chanai is habitual in Tanzania, where it is quite a rare surname, Algeria, where it is a rare surname, and Israel. Measured by absolute frequency, it is the most numerous in Tanzania, Algeria, and Thailand. More frequently, Chanai is the forename as well as the last name.