Cognomen ใหญ่วงศ์ (ใหญ่วงศ์, Yaikwawong 
) , in the entire world, is a very rare last name. The surname ใหญ่วงศ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Yaikwawong | Thailand |