Family name รัชธรรม (รัชธรรม 
) , in all the world, is an extremely rare surname. The cognomen รัชธรรม is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much more prevalently, รัชธรรม is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| รัชธรรม | Thailand |