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