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Last name Katai (Katai , カタイ , Катай ) , all over the world, is quite a rare family name. The cognomen Katai is habitual in Hungary, where it is quite a common surname, Botswana, where it is quite a rare surname, and Serbia. Measured by absolute frequency, it most frequently occurs in Hungary, Zambia, and Tanzania. Likewise, Katai is the forename as well as the last name.