Cognomen Soemfaeng (Soemfaeng 
) , across the world, is an extremely rare surname. The family name Soemfaeng is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Likewise, Soemfaeng is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Soemfaeng | Thailand |