Last name ธนรัตน์กิจ (ธนรัตน์กิจ 
) , in all the world, is an extremely rare surname. The family name ธนรัตน์กิจ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ธนรัตน์กิจ | Thailand |