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Cognomen Хаин (Hain , Khain , Xain ) , worldwide, is a common surname. The last name Хаин is characteristic of Reunion, where it is quite a common surname, Myanmar, and Germany, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in Germany, Myanmar, and the United States. Also, Хаин is the forename as well as the last name.