Last name Ся (Xia 
, Qiuping 
, Sia 
) , across the world, is a prevalent surname. The surname Ся is habitual in Cayman Islands, where it is a common surname, China, where it is quite a common surname, and Malaysia (explore the name in all countries). Not in comparison with a country's population, it is commonest in China, Malaysia, and Philippines. Much less frequently, Ся is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Xia | Philippines, Malaysia, China, United States, Indonesia |
| Qiuping | Malaysia, Spain, China, United States, Indonesia |
| Sia | Philippines, Malaysia, Tanzania, China, Indonesia |
| Ся | Kazakhstan, China, Kyrgyzstan, Russia, Ukraine |