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