Cognomen Suwanthara (Suwanthara 
) , around the globe, is a very rare family name. The cognomen Suwanthara is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Suwanthara | Thailand |
Winuta, Manaphat, Ruchirat, and Pitchathon