Cognomen Dumrongrak (Dumrongrak 
) , in the entire world, is a very rare last name. The last name Dumrongrak is habitual in Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. Also, Dumrongrak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Dumrongrak | Thailand, China |