Family name Phongsanith (Phongsanith 
) , around the world, is a very rare last name. The family name Phongsanith is habitual in South-eastern Asia, particularly Laos, where it is a rare surname. Much less frequently, Phongsanith is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phongsanith | Laos, United States |