Across the world, สมจัน (สมจัน 
) is a very rare epicene given name. The given name สมจัน is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare unisex name. Very seldom, สมจัน is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| สมจัน | Thailand |