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Cognomen Sulong (苏龙 , 素龙 , Sulong ) , all over the world, is a common family name. The cognomen Sulong is habitual in South-eastern Asia, particularly Malaysia, where it is quite a common surname, Brunei, where it is quite a rare surname, and Thailand. In absolute terms, it is the most numerous in Malaysia, Thailand, and China. Very seldom, Sulong is the forename as well as the last name.