Surname Phasavanh (Phasavanh 
) , all over the world, is a rare cognomen. The cognomen Phasavanh is habitual in Laos, where it is quite a rare surname, France, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| Phasavanh | Laos, France, United States |