Family name Yamngam (Yamngam 
) , worldwide, is a very rare cognomen. The cognomen Yamngam is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, Yamngam is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Yamngam | China, Thailand |
Pawat, Rungfa, Salinee, Sirirat, Surawut, Niramon, Chastapong, Nantawan, and Worachaiya