Last name สมเพ็ช (สมเพ็ช 
) , all over the world, is a very rare cognomen. The surname สมเพ็ช is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, สมเพ็ช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สมเพ็ช | Thailand |