Cognomen Nei (Nay 
, 妮 , Nei 
) , in the entire world, is a widespread family name. The last name Nei is habitual in Myanmar, where it is a common surname, Lesotho, where it is quite a rare surname, and Mongolia. Measured by absolute frequency, the name is most common in Myanmar, China, and Indonesia. More frequently, Nei is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Nay | Mongolia, Brazil, Myanmar, Malaysia, China |
| 妮 | China |
| Nei | Brazil, Myanmar, Malaysia, Indonesia, China |
| Ней | Kazakhstan, Russia, Kyrgyzstan, Armenia, Ukraine |
|
shō nei 7th king of the Ryukyu Kingdom (b. 1564) |
|
| tokio nei (1913-1984) (b. 1913) |
|
|
|
nei meme First Lady of Kiribati, KI |
|
|
yukichika nei |
|
| lembit nei Estonian chemist and environmental scientist, EE (b. 1957) |
|
|
| lembit nei researcher |
|
|
| saburo nei Japanese diplomat |
|