Cognomen Tawatsiriroj (Tawatsiriroj 
) , worldwide, is a very rare surname. The last name Tawatsiriroj is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Tawatsiriroj | Thailand |
Tawat, Chutamas, Passakorn, and Phaijittra