Cognomen Hardhian (Hardhian 
) , all around the world, is a rare last name. The cognomen Hardhian is habitual in South-eastern Asia, particularly Indonesia, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. Also, Hardhian is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hardhian | Malaysia, Indonesia |