Family name รุณโรจน์ (รุณโรจน์ 
) , around the world, is an extremely rare surname. The last name รุณโรจน์ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Much less frequently, รุณโรจน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| รุณโรจน์ | Thailand |