Surname Saiwin (Saiwin 
) , around the world, is a very rare cognomen. The family name Saiwin is characteristic of Myanmar, where it is a rare surname, and Venezuela, where it is an extremely rare surname. More frequently, Saiwin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Saiwin | Indonesia, Singapore, India, Myanmar, Venezuela |