Surname พจนาจ (พจนาจ 
) , all over the world, is a very rare family name. The family name พจนาจ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, พจนาจ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พจนาจ | Thailand |