Cognomen Rainos (Rainos 
) , in all the world, is a very rare last name. The last name Rainos is characteristic of Nicaragua, where it is a very rare surname, Nigeria, where it is an extremely rare surname, and Philippines. In absolute terms, it most frequently occurs in Nigeria, Philippines, and the United States. Predominantly, Rainos is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rainos | South Africa, Zimbabwe, Nigeria, United States, Philippines |