Cognomen Arreu (Arreo 
, Arreu 
) , globally, is a rare surname. The family name Arreu is characteristic of Philippines, where it is a rare surname, Spain, where it is a very rare surname, and Malaysia, where it is an extremely rare surname. In absolute terms, it is the most numerous in Philippines, Spain, and the United States. Much less frequently, Arreu is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Arreo | United States, Malaysia, Spain, Philippines |
| Arreu | Brazil, Spain |