Cognomen Allerta (Allerta 
) , across the world, is a very rare family name. The surname Allerta is characteristic of Italy, where it is a very rare surname, and Philippines, where it is an extremely rare surname. Very seldom, Allerta is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Allerta | Italy, United States, South Africa, Philippines |