Surname 贞汉 (贞汉 
) , in all the world, is a very rare family name. The family name 贞汉 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More frequently, 贞汉 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 贞汉 | China |