Cognomen ฮวน (Huan 
, Hoeun 
, ฮวน ) , all over the world, is a common surname. The cognomen ฮวน is habitual in Malaysia, where it is a common surname, Singapore, where it is quite a rare surname, and China. In absolute terms, it is commonest in Malaysia, China, and Vietnam. Also, ฮวน is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Huan | Indonesia, China, Vietnam, Malaysia, United States |
| Hoeun | South Korea, Malaysia, Thailand, United States, Canada |
| ฮวน | Thailand |