Cognomen ริวรรณ์ (ริวรรณ์ 
) , all over the world, is an extremely rare family name. The cognomen ริวรรณ์ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, ริวรรณ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ริวรรณ์ | Thailand |