Cognomen Thumpharak (Thumpharak 
) , in all the world, is an extremely rare family name. The last name Thumpharak is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Thumpharak | Thailand |
Phaiwan, Yardrung, Jiraporn, and Khanuengnut