Family name Garrein (Garrein 
) , in the entire world, is a very rare cognomen. The last name Garrein is characteristic of Western Europe, particularly Belgium, where it is a rare surname, and France, where it is a very rare surname. Much less frequently, Garrein is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Garrein | Belgium, France, Philippines |