Cognomen ธนทรัพย์หิรัญ (ธนทรัพย์หิรัญ 
) , throughout the world, is a very rare last name. The last name ธนทรัพย์หิรัญ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ธนทรัพย์หิรัญ | Thailand |