Family name โกศลประเสริฐ (โกศลประเสริฐ 
) , around the globe, is an extremely rare cognomen. The surname โกศลประเสริฐ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| โกศลประเสริฐ | Thailand |