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