Family name グエン (Nguyễn 
, Nguyen , グエン 
) , around the world, is a prevalent surname. The family name グエン 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). Measured by absolute frequency, it is the most numerous in Vietnam, the United States, and Australia. Very seldom, グエン is the forename as well as the last name.