Family name Promaiam (Promaiam 
) , worldwide, is a very rare cognomen. The last name Promaiam is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Promaiam | Thailand |
Kalnatt, Sangworn, Sineemas, Suthanya, and Ammarapron