Family name Arnau Alejandro (Arnau Alejandro 
) , in the entire world, is an extremely rare surname. The cognomen Arnau Alejandro is habitual in Latin America and the Caribbean, particularly Chile, where it is an extremely rare surname. More prevalently, Arnau Alejandro is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Arnau Alejandro | Chile, Spain |