Family name Ruamrattanatrai (Ruamrattanatrai 
) , in the entire world, is a very rare last name. The last name Ruamrattanatrai is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Ruamrattanatrai | Thailand, United States |