Family name สิษฐ์ (Sit 
, สิษฐ์ 
) , all around the world, is a common last name. The last name สิษฐ์ is characteristic of Macao, where it is quite a common surname, Bermuda, and Hong Kong (explore the name in all countries). Measured by absolute frequency, it is the most numerous in India, Myanmar, and Hong Kong. Also, สิษฐ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sit | China, Myanmar, India, Hong Kong, Taiwan |
| สิษฐ์ | Thailand |