Surname สมภักดิ์ (สมภักดิ์ 
, Sompak 
) , worldwide, is a rare family name. The surname สมภักดิ์ is habitual in Thailand, where it is a rare surname, and India, where it is an extremely rare surname. More frequently, สมภักดิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สมภักดิ์ | Thailand |
| Sompak | India, United States, Thailand |