Cognomen 贞跃 (贞跃 
) , throughout the world, is a very rare family name. The cognomen 贞跃 is habitual in Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 贞跃 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 贞跃 | China |