Family name ฤทธิ์ธีโรจนกิจ (ฤทธิ์ธีโรจนกิจ 
) , across the world, is an extremely rare surname. The surname ฤทธิ์ธีโรจนกิจ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิ์ธีโรจนกิจ | Thailand |