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Surname Chitin (Chitin , Chitine, จิตอิน ) , in the world, is a very rare cognomen. The family name Chitin is habitual in Thailand, where it is a very rare surname, Israel, and the United States, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Thailand, the United States, and India. More prevalently, Chitin is the forename as well as the last name.