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