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Surname Tyana (Тяна , Tyana , Тиана ) , in the entire world, is quite a rare last name. The cognomen Tyana is habitual in Bulgaria, where it is quite a common surname, Uruguay, where it is a rare surname, and Indonesia. Measured by absolute frequency, it is the most numerous in Bulgaria, Indonesia, and South Africa. Also, Tyana is the forename as well as the last name.