Last name ลออวงศ์วาณิช (ลออวงศ์วาณิช 
) , around the globe, is an extremely rare family name. The cognomen ลออวงศ์วาณิช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ลออวงศ์วาณิช | Thailand |