Last name ธนโรจน์จิรกุล (ธนโรจน์จิรกุล 
) , across the world, is a very rare cognomen. The cognomen ธนโรจน์จิรกุล is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ธนโรจน์จิรกุล | Thailand |