Cognomen สมพรภักดิ์ (Sompornphak 
, สมพรภักดิ์ , Sompornpuk ) , all around the world, is a very rare family name. The cognomen สมพรภักดิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, สมพรภักดิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sompornpuk, Sompornphak, สมพรภักดิ์ | Thailand |