Family name ไพโรจน์อุดมกิจ (ไพโรจน์อุดมกิจ 
) , across the world, is a very rare last name. The surname ไพโรจน์อุดมกิจ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ไพโรจน์อุดมกิจ | Thailand |