Cognomen Giun (Giun 
) , in the entire world, is a rare surname. The cognomen Giun is habitual in Malaysia, where it is a rare surname, Vietnam, where it is a very rare surname, and Canada, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Malaysia, Vietnam, and India. More prevalently, Giun is the forename as well as the last name.