Surname ประสิทธิคุณ (ประสิทธิคุณ 
) , around the world, is an extremely rare cognomen. The family name ประสิทธิคุณ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, ประสิทธิคุณ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| ประสิทธิคุณ | Thailand |