Last name โพโรจน์ (โพโรจน์ 
) , around the globe, is an extremely rare cognomen. The surname โพโรจน์ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, โพโรจน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| โพโรจน์ | Thailand |