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Last name Гаиса (Gaisa , Gaysa , Гаиса ) , across the world, is a rare surname. The surname Гаиса is habitual in Latvia, where it is quite a rare surname, Belarus, where it is a very rare surname, and South Africa. Measured by absolute frequency, it is commonest in Nigeria, South Africa, and Germany. More frequently, Гаиса is the forename as well as the last name.
Резяпов, and Калимуллин