Cognomen ขจรศาสตร์ (ขจรศาสตร์ 
, Kajornsart , Kajornsat ) , all around the world, is a very rare family name. The surname ขจรศาสตร์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, ขจรศาสตร์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kajornsart, Kajornsat, ขจรศาสตร์, Khajonsart | Thailand |