Cognomen พจน์พิศุทธิพงศ์ (พจน์พิศุทธิพงศ์ 
) , globally, is a very rare last name. The last name พจน์พิศุทธิพงศ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| พจน์พิศุทธิพงศ์ | Thailand |