Last name วจนะพงศ์ (วจนะพงศ์ 
) , globally, is an extremely rare family name. The surname วจนะพงศ์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Likewise, วจนะพงศ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| วจนะพงศ์ | Thailand |