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