Family name Arnaldo Agustin (Arnaldo Agustin 
) , around the world, is an extremely rare cognomen. The cognomen Arnaldo Agustin is characteristic of Latin America and the Caribbean, particularly Chile, where it is a very rare surname. More prevalently, Arnaldo Agustin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Arnaldo Agustin | Argentina, Spain, Ecuador, Chile, Peru |