Family name พรหมหิรัญ (พรหมหิรัญ 
, Promhiran , Promhirun ) , in the entire world, is a very rare last name. The last name พรหมหิรัญ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Promhiran, Promhirun, พรหมหิรัญ, Phromhiran | Thailand |