Around the globe, 贞鸿 (贞鸿 
) is a very rare epicene first name. The given name 贞鸿 is characteristic of Eastern Asia, particularly China, where it is an extremely rare epicene name. Much less frequently, 贞鸿 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 贞鸿 | China |