Family name Vilaiphan (Vilaiphan 
) , all over the world, is a rare cognomen. The surname Vilaiphan is habitual in South-eastern Asia, particularly Laos, where it is quite a rare surname, and Thailand, where it is a very rare surname. Likewise, Vilaiphan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Vilaiphan | Laos, Thailand |