Surname สไว (Swai 
, สไว ) , globally, is a common family name. The last name สไว is habitual in Tanzania, where it is quite a common surname, Kenya, where it is quite a rare surname, and United Arab Emirates, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Tanzania, India, and Kenya. Very seldom, สไว is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Swai | Tanzania, Pakistan, Kenya, Thailand, India |
| สไว | Thailand |