Cognomen Xiau (Xiau 
) , all around the world, is quite a rare family name. The surname Xiau is characteristic of South-eastern Asia, particularly Malaysia, where it is quite a rare surname, and Indonesia, where it is a very rare surname. Very seldom, Xiau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Xiau | Australia, United States, Malaysia, Indonesia, China |