Cognomen Chamsiri (Chamsiri 
, ฉ่ำศิริ, แจ่มศิริ) , in the world, is a very rare family name. The cognomen Chamsiri is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, Chamsiri is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Chamsiri | Thailand |