Family name ซื่อประเสริฐ (ซื่อประเสริฐ, Cheyprasert 
) , in all the world, is a very rare surname. The last name ซื่อประเสริฐ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Cheyprasert | Thailand |