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