Cognomen Wailwonnajit (Wailwonnajit 
) , around the world, is a rare surname. The family name Wailwonnajit is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname.
| VARIANT | COUNTRY |
|---|---|
| Wailwonnajit | Thailand |
Suwanna, Kunanon, and Chananchida