Cognomen เบ็ญจธรรมรัตน์ (เบ็ญจธรรมรัตน์ 
) , around the globe, is an extremely rare family name. The surname เบ็ญจธรรมรัตน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| เบ็ญจธรรมรัตน์ | Thailand |