Cognomen สหเดช (Sahadet 
, สหเดช , Sahadech ) , in all the world, is a very rare family name. The surname สหเดช is habitual in Thailand, where it is a very rare surname, and India, where it is an extremely rare surname. More prevalently, สหเดช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sahadet | Saudi Arabia, France, Turkey, India, Thailand |
| สหเดช, Sahadej | Thailand |
| Sahadech | India, Thailand |