Family name สมเด็ช (สมเด็ช 
) , around the world, is an extremely rare surname. The surname สมเด็ช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, สมเด็ช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สมเด็ช | Thailand |