Family name สิด (Sit 
, สิด 
) , in all the world, is a common cognomen. The surname สิด is habitual in Macao, where it is quite a common surname, Bermuda, and Hong Kong (explore the name in all countries). Measured by absolute frequency, this name is the most popular in India, Myanmar, and Hong Kong. Likewise, สิด is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sit | Hong Kong, Myanmar, Taiwan, India, China |
| สิด | Thailand |