Last name สีไว (สีไว 
, Sivai 
) , around the globe, is a rare family name. The surname สีไว is habitual in Thailand, where it is a rare surname, South Africa, where it is a very rare surname, and India, where it is an extremely rare surname. More prevalently, สีไว is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สีไว | Thailand |
| Sivai | Canada, South Africa, India, Thailand, United States |