Family name เพชรโรจน์ฺ (เพชรโรจน์ฺ 
) , around the world, is an extremely rare last name. The cognomen เพชรโรจน์ฺ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| เพชรโรจน์ฺ | Thailand |