Cognomen กุลเสถียร (กุลเสถียร 
) , all around the world, is a very rare surname. The last name กุลเสถียร is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Very seldom, กุลเสถียร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| กุลเสถียร | Thailand |