Last name มุสิทธิ์ (มุสิทธิ์ 
) , in the world, is a very rare family name. The surname มุสิทธิ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, มุสิทธิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| มุสิทธิ์ | Thailand |