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Surname Weng (Weng , 温 , 翁 ) , throughout the world, is a prevalent cognomen. The last name Weng is habitual in Malaysia, where it is a common surname, China, and Macao, where it is quite a common surname (explore the name in all countries). In absolute terms, the name is most common in China, Malaysia, and Taiwan. Very seldom, Weng is the forename as well as the last name.