Family name พจนาวงษ์พานิช (พจนาวงษ์พานิช 
) , around the world, is a very rare cognomen. The family name พจนาวงษ์พานิช is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| พจนาวงษ์พานิช | Thailand |