Cognomen สมผล (Somphon 
, สมผล , Somphol 
) , in the entire world, is a rare surname. The family name สมผล is habitual in South-eastern Asia, particularly Laos, where it is a rare surname, Thailand, and Malaysia, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Thailand, Laos, and the United States. More frequently, สมผล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Somphon | Malaysia, Thailand, India, Laos, United States |
| สมผล | Thailand |
| Somphol | Australia, Malaysia, Thailand, United States, United Kingdom |