Family name จรัสธีรพจน์ (จรัสธีรพจน์ 
) , all over the world, is an extremely rare last name. The surname จรัสธีรพจน์ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| จรัสธีรพจน์ | Thailand |