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