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Cognomen Nguyên (Nguyen , Nguyên , Нгуен ) , all around the world, is a prevalent last name. The cognomen Nguyên is habitual in Vietnam, where it is a prevalent surname, Macao, and Australia, where it is a common surname (explore the name in all countries). In absolute terms, it is the most numerous in Vietnam, the United States, and Australia. Much less frequently, Nguyên is the forename as well as the last name.