Surname ฤายศ (ฤายศ 
) , in the entire world, is a very rare cognomen. The surname ฤายศ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, ฤายศ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ฤายศ | Thailand |