Cognomen រ័ត្ម (រ័ត្ម 
) , worldwide, is a very rare surname. The last name រ័ត្ម is habitual in South-eastern Asia, particularly Cambodia, where it is a very rare surname. Also, រ័ត្ម is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| រ័ត្ម | Cambodia |