Cognomen Prajammuang (Prajammuang 
) , in the entire world, is a very rare surname. The surname Prajammuang is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Prajammuang | Thailand |
Nongnute, Pratoomporn, and Phonphaibool