Surname ราชประเสริฐ (ราชประเสริฐ 
, Rathprasert , Ratprasoet) , all around the world, is a very rare last name. The family name ราชประเสริฐ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Rathprasert, ราชประเสริฐ | Thailand |