Family name Rainier Arnoldo (Rainier Arnoldo 
) , around the world, is an extremely rare surname. The cognomen Rainier Arnoldo is habitual in Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. Likewise, Rainier Arnoldo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rainier Arnoldo | Chile |