Family name Сю (Xiu 
, Xufeng 
, Сю 
) , in the world, is a common cognomen. The family name Сю is habitual in Malaysia, where it is quite a common surname, Belize, and China, where it is quite a rare surname. In absolute terms, the name is most common in China, Malaysia, and Mexico. Also, Сю is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Xiu | Indonesia, China, Malaysia, Mexico, United States |
| Xufeng | China, Malaysia, Singapore, Taiwan, United States |
| Сю | Kyrgyzstan, Kazakhstan, Russia, Ukraine |
| Shū | China |