Cognomen Nandavong (Nandavong 
) , in the world, is a rare last name. The cognomen Nandavong is characteristic of Laos, where it is quite a rare surname, and Australia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Nandavong | Australia, Laos |
Oulayvanh, and Phongpadid