Cognomen Vilayphonh (Vilayphonh 
) , throughout the world, is a rare surname. The cognomen Vilayphonh 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 |
|---|---|
| Vilayphonh | Laos, United States, Canada, France |