Family name Promnam-Ang (Promnam-Ang 
) , globally, is an extremely rare cognomen. The cognomen Promnam-Ang is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Parts of the name also exists independently as a last name Promnam, and a first name Ang.
| VARIANT | COUNTRY |
|---|---|
| Promnam-Ang | Thailand |