Cognomen 非子 (非子 
, Feizi 
) , in the world, is quite a rare surname. The surname 非子 is characteristic of Iran, where it is quite a rare surname, Georgia, where it is a rare surname, and Greece. Measured by absolute frequency, it is commonest in Iran, China, and the United States. Also, 非子 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 非子 | China |
| Feizi | Tanzania, Canada, Iran, United States, China |