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Surname Nghiêm (严 , Nghiem , Nghiêm ) , worldwide, is a prevalent cognomen. The family name Nghiêm is characteristic of China, where it is a common surname, Vietnam, where it is quite a rare surname, and Australia, where it is a rare surname. In absolute terms, it most frequently occurs in China, Vietnam, and the United States. Much less frequently, Nghiêm is the forename as well as the last name.