Cognomen រីទ្ធ (រីទ្ធ 
) , all around the world, is an extremely rare last name. The cognomen រីទ្ធ is characteristic of South-eastern Asia, particularly Cambodia, where it is a very rare surname. Likewise, រីទ្ធ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| រីទ្ធ | Cambodia |