Surname Mariano Arnoldo (Mariano Arnoldo 
) , globally, is an extremely rare cognomen. The cognomen Mariano Arnoldo is habitual in Latin America and the Caribbean, particularly Chile, where it is a very rare surname. More prevalently, Mariano Arnoldo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Mariano Arnoldo | Chile, Peru, Ecuador |