Last name Inyun (Inyun 
) , globally, is a very rare surname. The cognomen Inyun is habitual in South-eastern Asia, particularly Malaysia, where it is a very rare surname, Indonesia, and Thailand, where it is an extremely rare surname. In absolute terms, the name is most common in Indonesia, Malaysia, and China. Very seldom, Inyun is the forename as well as the last name.