Cognomen ศีลสวัสดิ์ (ศีลสวัสดิ์ 
) , in the entire world, is an extremely rare family name. The family name ศีลสวัสดิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ศีลสวัสดิ์ | Thailand |