Family name រស្ស (Rassa 
, រស្ស 
) , around the world, is quite a rare last name. The family name រស្ស is habitual in Estonia, where it is quite a rare surname, Latvia, and Afghanistan, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Indonesia, Afghanistan, and Estonia. Likewise, រស្ស is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rassa | Afghanistan, Ethiopia, Indonesia, India, Democratic Republic of the Congo |
| រស្ស | Cambodia |