Family name สมัช (Samat 
, สมัช ) , across the world, is a common last name. The last name สมัช is characteristic of South-eastern Asia, particularly Malaysia, where it is quite a common surname, Brunei, and Singapore. Measured by absolute frequency, it is the most numerous in Malaysia, India, and Indonesia. Also, สมัช is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Samat | Thailand, India, Indonesia, Malaysia, Turkey |
| สมัช | Thailand |