Family name ฤทธิ์เลิศ (ฤทธิ์เลิศ 
) , across the world, is a rare last name. The family name ฤทธิ์เลิศ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, ฤทธิ์เลิศ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิ์เลิศ | Thailand |