Family name ฤทธิ์มงคล (ฤทธิ์มงคล 
, Ritmongkol , Ritmongkon ) , throughout the world, is a rare cognomen. The family name ฤทธิ์มงคล is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, ฤทธิ์มงคล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ฤทธิ์มงคล, Ritmongkol, Ritmongkon | Thailand |