Surname Sergio Arnaldo (Sergio Arnaldo 
) , around the globe, is a rare cognomen. The cognomen Sergio Arnaldo is habitual in Latin America and the Caribbean, particularly Chile, where it is a rare surname. More frequently, Sergio Arnaldo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sergio Arnaldo | Argentina, Brazil, Peru, Ecuador, Chile |