Surname Ruiva (Ruiva 
) , across the world, is a very rare last name. The cognomen Ruiva is characteristic of Portugal, where it is a rare surname, Brazil, where it is a very rare surname, and Venezuela, where it is an extremely rare surname. Not in comparison with a country's population, it is commonest in India, Brazil, and Portugal. Also, Ruiva is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruiva | Portugal, Venezuela, United States, India, Brazil |