Family name Raiin (Raiin 
) , throughout the world, is a rare surname. The surname Raiin is habitual in Myanmar, where it is a very rare surname, India, and Nigeria, where it is an extremely rare surname. Very seldom, Raiin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Raiin | Japan, Nigeria, United States, India, Myanmar |