Cognomen ศุล (Sunla 
, ศุล ) , around the world, is an extremely rare family name. The surname ศุล is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, ศุล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sunla | Austria, South Africa, Thailand, United States, India |
| ศุล | Thailand |