Surname Viengdavanh (Viengdavanh 
) , all around the world, is an extremely rare family name. Predominantly, Viengdavanh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Viengdavanh | Laos, United States |
Chaleunrath, Sondavanh, and Phommachanh