Cognomen 卍空 (卍空 
, Mankuu 
) , across the world, is an extremely rare last name. The last name 卍空 is habitual in Southern Asia, particularly India, where it is an extremely rare surname. More prevalently, 卍空 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 卍空 | China |
| Mankuu | India |