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