Cognomen Loungthavivanh (Loungthavivanh 
) , throughout the world, is a rare family name. The surname Loungthavivanh is characteristic of South-eastern Asia, particularly Laos, where it is quite a rare surname, and Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Loungthavivanh | Laos, Thailand |