Family name ธนหิรัญรัตนา (ธนหิรัญรัตนา 
) , in the world, is an extremely rare cognomen. The surname ธนหิรัญรัตนา is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ธนหิรัญรัตนา | Thailand |