Surname Hyen (Hyen 
, Hyène 
) , across the world, is quite a rare family name. The cognomen Hyen is habitual in Malaysia, where it is quite a rare surname, Taiwan, where it is a rare surname, and Hong Kong. Measured by absolute frequency, it is commonest in Malaysia, Taiwan, and South Korea. Much less frequently, Hyen is the forename as well as the last name.