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