Last name พจนากุลโสภณ (พจนากุลโสภณ 
) , all around the world, is an extremely rare family name. The surname พจนากุลโสภณ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| พจนากุลโสภณ | Thailand |