Surname Shwain (Shwain 
) , in all the world, is a very rare cognomen. The surname Shwain is habitual in Myanmar, where it is a very rare surname, and India, where it is an extremely rare surname. Much less frequently, Shwain is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Shwain | Myanmar, United Kingdom, India |