Surname Philayvanh (Philayvanh 
) , in the world, is a very rare cognomen. The family name Philayvanh is characteristic of Northern America, particularly the United States, where it is an extremely rare surname. Much more prevalently, Philayvanh is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Philayvanh | Laos, United States |