Family name คำแพง (Khammeng 
, Khamphang , Khampheang ) , in the world, is a very rare last name. The family name คำแพง is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. More prevalently, คำแพง is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Khammeng | Laos, Canada, Thailand, United States |
| Khampheang, Khamphang | Thailand, United States |
Kamepaeng, Kamglang, Kampaeng, Khamepaeng, Khamgaeng, Khammanoen, Khamngaen, Khampeang, Khamplaeng, and Kumpeang