Cognomen Arwun (อรวรรณ 
, Arwun 
) , in the world, is an extremely rare family name. The cognomen Arwun is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Predominantly, Arwun is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| อรวรรณ | Thailand |
| Arwun | India, Thailand |