Family name Wongkasai (Wongkasai 
) , worldwide, is a very rare surname. The family name Wongkasai is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Wongkasai | Thailand |
Nitaya, Chuwong, Wittawat, Catthaleeya, and Cattaleeya