Family name Alerich (Alerich 
) , in all the world, is a very rare surname. The surname Alerich is habitual in Argentina, where it is a very rare surname, the United States, where it is an extremely rare surname, and Canada. More prevalently, Alerich is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Alerich | Spain, United States, Argentina, Canada, Democratic Republic of the Congo |