Globally, Matias Arnaldo (Matias Arnaldo 
) is a rare boy's given name. The first name Matias Arnaldo is habitual in Latin America and the Caribbean, particularly Paraguay, where it is quite a rare male name, and Chile, where it is a rare male name. Very seldom, Matias Arnaldo is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Matias Arnaldo | Paraguay, Chile, Argentina |