Cognomen ศิลาลัย (ศิลาลัย 
, Silalai , Silasalai 
) , around the world, is a rare last name. The family name ศิลาลัย is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ศิลาลัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Silalai, ศิลาลัย | Thailand |
| Silasalai | Thailand, Switzerland |