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Surname Həsən (Хасан , Гасан , Həsən ) , all around the world, is quite a common family name. The cognomen Həsən is habitual in Bulgaria, where it is quite a common surname, Kyrgyzstan, and Azerbaijan, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Bulgaria, Kyrgyzstan, and Russia. More frequently, Həsən is the forename as well as the last name.