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