Surname Ruio (Ruio 
) , in the entire world, is a rare last name. The family name Ruio is habitual in Malaysia, where it is quite a rare surname, Venezuela, where it is an extremely rare surname, and Mexico. Measured by absolute frequency, it most frequently occurs in Malaysia, China, and Mexico. Very seldom, Ruio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ruio | China, Malaysia, Mexico, United States, India |