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Cognomen Tamai (タマイ , Tamai , 玉井 ) , in all the world, is quite a rare last name. The cognomen Tamai is habitual in Belize, where it is quite a common surname, Papua New Guinea, where it is quite a rare surname, and Italy. In absolute terms, it most frequently occurs in India, Italy, and Japan. More frequently, Tamai is the forename as well as the last name.