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Cognomen Khayyam (Khayyam , Хайям , Хаям ) , all over the world, is quite a rare surname. The cognomen Khayyam is habitual in Azerbaijan, where it is quite a rare surname, Trinidad and Tobago, and Qatar, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Southern Asia, particularly Pakistan, Bangladesh, and India. Likewise, Khayyam is the forename as well as the last name.