Family name ฤทธิมณี (ฤทธิมณี 
, Rithmanee 
) , throughout the world, is a very rare surname. The family name ฤทธิมณี is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname, and Cambodia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิมณี | Thailand |
| Rithmanee | Cambodia, Thailand |
| ธรรมนูญ ฤทธิมณี Thai politician, TH (b. 1935) |
|