Cognomen ចាំ (ចាំ 
, จำ) , around the globe, is quite a rare family name. The cognomen ចាំ is habitual in South-eastern Asia, particularly Cambodia, where it is quite a rare surname. Likewise, ចាំ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ចាំ | Cambodia |