Cognomen รื่น (Ruen 
, รื่น, Be Happy) , in the entire world, is a rare family name. The surname รื่น is characteristic of Serbia, where it is a rare surname, Norway, and Malaysia. In absolute terms, it most frequently occurs in the United States, Malaysia, and France. Likewise, รื่น is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruen | Philippines, Taiwan, Thailand, United States, Malaysia |