Family name ออนเกษม (ออนเกษม 
) , globally, is an extremely rare surname. The surname ออนเกษม is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much less frequently, ออนเกษม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ออนเกษม | Thailand |