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