Family name Prommayom (Prommayom 
) , in the world, is a very rare last name. The last name Prommayom is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Prommayom | Thailand |
Plkul, Emika, Eknarin, Nattawut, and Chandasorn