Last name สมวัตร (สมวัตร 
) , around the world, is an extremely rare cognomen. The cognomen สมวัตร is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Also, สมวัตร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สมวัตร | Thailand |