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