Surname สีด (Sit 
, สีด 
) , in the world, is a common cognomen. The surname สีด is habitual in Macao, where it is quite a common surname, Bermuda, and Hong Kong (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in India, Myanmar, and Hong Kong. Also, สีด is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sit | Hong Kong, Myanmar, Taiwan, India, China |
| สีด | Thailand |