Surname ยงค์กิจหิรัญกุล (ยงค์กิจหิรัญกุล 
) , throughout the world, is an extremely rare cognomen. The family name ยงค์กิจหิรัญกุล is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ยงค์กิจหิรัญกุล | Thailand |