Cognomen Sumawong (Sumawong 
) , in all the world, is a rare family name. The last name Sumawong is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Very seldom, Sumawong is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sumawong | United States, Thailand |