Cognomen Souphavong (Souphavong 
) , in all the world, is a rare last name. The surname Souphavong is characteristic of Laos, where it is quite a rare surname, Switzerland, where it is a rare surname, and Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Souphavong | Laos, Switzerland, France, United States, Thailand |