Cognomen Pratchayamethi (Pratchayamethi 
) , in all the world, is a very rare family name. The cognomen Pratchayamethi is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Pratchayamethi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Pratchayamethi | Thailand |