Cognomen Sonnuwat (Sonnuwat 
) , throughout the world, is a very rare last name. The cognomen Sonnuwat is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Sonnuwat | Thailand |
Chakkri, Jiranun, Piyachart, Thanyathorn, and Whatcharakorn