Globally, คูณประเสริฐ (คูณประเสริฐ 
, Kaunprasert , Koonprasert 
) is an extremely rare unknown gender first name. Much more prevalently, คูณประเสริฐ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| คูณประเสริฐ, Kaunprasert | Thailand |
| Koonprasert | United States, Thailand |