Surname 九 (Chin 
, 九 ) , across the world, is a widespread family name. The last name 九 is characteristic of South-eastern Asia, particularly Malaysia, where it is a widespread surname, Brunei, where it is a common surname, and Singapore (explore the name in all countries). In absolute terms, it is the most numerous in Malaysia, China, and the United States. Very seldom, 九 is the forename as well as the last name.