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 | Malaysia, Mexico, United States, Indonesia, China |
| Xufeng | Singapore, Malaysia, Taiwan, United States, China |
| Сю | Kazakhstan, Kyrgyzstan, Russia, Ukraine |
| Shū | China |