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