Cognomen เดชพจน์ (เดชพจน์ 
) , in the world, is a very rare family name. The cognomen เดชพจน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, เดชพจน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| เดชพจน์ | Thailand |