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