Cognomen สมเด็ด (สมเด็ด 
) , in the world, is a very rare family name. The family name สมเด็ด is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, สมเด็ด is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สมเด็ด | Thailand |
จีนคง, ดวงศรี, เหลาหมวด, แสงสวาง, and พรหมสวัสดิ์