Last name ศิว์ (Si 
, ศิว์ 
) , worldwide, is a widespread family name. The cognomen ศิว์ is characteristic of Macao, where it is a common surname, Myanmar, and Malaysia, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, the name is most common in China, India, and Myanmar. Also, ศิว์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Si | China, Morocco, India, Myanmar, Indonesia |
| ศิว์ | Thailand |