Last name พรหมธนากร (พรหมธนากร 
, Virunthanakorn , Promtanakon 
) , throughout the world, is a very rare family name. The last name พรหมธนากร is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| พรหมธนากร, Virunthanakorn | Thailand |
| Promtanakon | United States, Thailand |