Cognomen 沂鸿 (沂鸿 
) , globally, is a very rare surname. The family name 沂鸿 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 沂鸿 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 沂鸿 | China |