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