Cognomen Roobngam (Roobngam 
) , worldwide, is a very rare last name. The surname Roobngam is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Roobngam | Thailand |
Surasak, Uthumporn, Aungsumarin, and Patcharaporn