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