Last name กุศลาสัย (กุศลาสัย 
) , throughout the world, is a very rare surname. The family name กุศลาสัย is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| กุศลาสัย | Thailand |
| กรุณา กุศลาสัย Thai writer, TH (b. 1920) |
|
|
| เรืองอุไร กุศลาสัย TH (b. 1920) |
|