Cognomen ใสย์ (ใสย์ 
) , in the world, is an extremely rare surname. The last name ใสย์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more frequently, ใสย์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ใสย์ | Thailand |