In all the world, 贞汉 (贞汉 
) is a very rare boy's forename. The given name 贞汉 is characteristic of Eastern Asia, particularly China, where it is an extremely rare masculine name. Very seldom, 贞汉 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| 贞汉 | China |