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