Family name ถนัดกุลกิจ (ถนัดกุลกิจ 
) , in the world, is an extremely rare last name. The last name ถนัดกุลกิจ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ถนัดกุลกิจ | Thailand |