Cognomen Pratumchad (Pratumchad 
) , in all the world, is a very rare family name. The last name Pratumchad is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Pratumchad | Thailand |
Tum, Wannisa, Wilawun, and Phajongjid