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