Last name พจน์สุวรรณ (พจน์สุวรรณ 
) , throughout the world, is a very rare surname. The cognomen พจน์สุวรรณ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, พจน์สุวรรณ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พจน์สุวรรณ | Thailand |