Cognomen Rujarat (Rujarat 
) , across the world, is an extremely rare family name. The family name Rujarat is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, Rujarat is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rujarat | Thailand |
Yonsuwan, Boonritchaisri, and Sawatdipan