Cognomen ខ្នំ (ខ្នំ 
) , in the entire world, is an extremely rare last name. The last name ខ្នំ is habitual in South-eastern Asia, particularly Cambodia, where it is a very rare surname. Likewise, ខ្នំ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ខ្នំ | Cambodia |