Cognomen Phiengsavanh (Phiengsavanh 
) , all over the world, is a rare last name. The family name Phiengsavanh is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname. Very seldom, Phiengsavanh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Phiengsavanh | Laos, France, United States |