Cognomen Supanthamat (Supanthamat 
) , all around the world, is a very rare family name. The last name Supanthamat is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Supanthamat | Thailand |
Nattaya, Chayakan, Theerasak, and Patcharaporn