Cognomen Romayasuwaroj (Romayasuwaroj 
) , in the entire world, is a very rare family name. The last name Romayasuwaroj is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Romayasuwaroj | Thailand |
Chayanit, Natthakit, and Natthawong