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Cognomen Belai (Belai , Белай , Белаи ) , all around the world, is quite a rare last name. The last name Belai is habitual in Hungary, where it is quite a rare surname, Oman, where it is a rare surname, and Kazakhstan. Measured by absolute frequency, this name is the most popular in India, Russia, and Brazil. Very seldom, Belai is the forename as well as the last name.