Last name ฤทธิพงค์ (ฤทธิพงค์ 
) , across the world, is a very rare cognomen. The last name ฤทธิพงค์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, ฤทธิพงค์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิพงค์ | Thailand |