Cognomen ตรงเจริญกิจ (ตรงเจริญกิจ 
) , in the world, is an extremely rare family name. The last name ตรงเจริญกิจ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ตรงเจริญกิจ | Thailand |