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Surname Tantai (Tantai , แทนไท , Тантай ) , in the entire world, is a rare cognomen. The surname Tantai is habitual in Thailand, where it is a rare surname, Russia, where it is a very rare surname, and Kazakhstan. Measured by absolute frequency, it most frequently occurs in China, Thailand, and Russia. Likewise, Tantai is the forename as well as the last name.