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Cognomen คู่ (Khu , Pairpassa , คู่) , around the world, is a common surname. The cognomen คู่ is characteristic of Myanmar, where it is quite a common surname, Mongolia, where it is quite a rare surname, and Malaysia. Measured by absolute frequency, this name is the most popular in Myanmar, Indonesia, and India. Likewise, คู่ is the forename as well as the last name.