Last name Sinnavong (Sinnavong 
) , throughout the world, is a very rare surname. The cognomen Sinnavong is characteristic of Laos, where it is quite a rare surname, Thailand, where it is an extremely rare surname, and the United States. Very seldom, Sinnavong is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sinnavong | United States, Laos, Thailand |