Family name ฤทธาภรณ์ (ฤทธาภรณ์ 
, Rithaporn 
, Rittaporn ) , all over the world, is a rare last name. The surname ฤทธาภรณ์ is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| ฤทธาภรณ์, Rithaphorn, Rittaporn | Thailand |
| Rithaporn | United States, Thailand |