Surname ซิ้ว (Sio 
, ซิ้ว) , worldwide, is a common family name. The family name ซิ้ว is habitual in Macao, where it is a common surname, Mozambique, where it is quite a rare surname, and Hong Kong. Measured by absolute frequency, this name is the most popular in Macao, Mozambique, and Philippines. Also, ซิ้ว is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sio | Taiwan, Indonesia, Macao, Mozambique, Philippines |