Surname Rainah (Rainah 
) , in all the world, is a rare cognomen. The family name Rainah is habitual in Indonesia, where it is a rare surname, Malaysia, where it is a very rare surname, and South Africa, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Indonesia, Malaysia, and Nigeria. Also, Rainah is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rainah | South Africa, Philippines, United States, Indonesia, Malaysia |