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Family name Khuan (Khuan , ควร , ควน ) , around the world, is a common cognomen. The last name Khuan is habitual in Malaysia, where it is quite a common surname, Singapore, where it is quite a rare surname, and Taiwan, where it is a rare surname. In absolute terms, this name is the most popular in Malaysia, India, and China. Much less frequently, Khuan is the forename as well as the last name.