Surname 贤愚 (贤愚 
) , in the entire world, is a very rare cognomen. The family name 贤愚 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 贤愚 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 贤愚 | China |