Cognomen ฤทธิเลิศนภา (ฤทธิเลิศนภา 
, Rittilertnapa ) , in all the world, is a very rare last name. The surname ฤทธิเลิศนภา is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิเลิศนภา, Rittilertnapa | Thailand |