Cognomen รุจาธร (รุจาธร 
) , throughout the world, is an extremely rare family name. The family name รุจาธร is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Also, รุจาธร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| รุจาธร | Thailand |