Cognomen 钰贞 (钰贞 
) , around the globe, is a very rare family name. The cognomen 钰贞 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 钰贞 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 钰贞 | China |