Surname ลออวงศ์ไพศาล (ลออวงศ์ไพศาล 
) , throughout the world, is an extremely rare cognomen. The surname ลออวงศ์ไพศาล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ลออวงศ์ไพศาล | Thailand |