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Cognomen Tagai (Tagai , Тагай , Тагаи ) , all around the world, is quite a rare family name. The cognomen Tagai is characteristic of Kyrgyzstan, where it is quite a rare surname, Hungary, and Belarus. Measured by absolute frequency, the name is most common in Kyrgyzstan, Hungary, and Russia. More prevalently, Tagai is the forename as well as the last name.