Cognomen Bréf (Brev 
, Brevis 
, Bréf 
) , around the globe, is quite a rare surname. The family name Bréf is habitual in Chile, where it is quite a rare surname, Uruguay, where it is a rare surname, and South Africa. Measured by absolute frequency, this name is the most popular in Chile, South Africa, and Argentina. Likewise, Bréf is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Brev | India, France, United States, United Kingdom, Democratic Republic of the Congo |
| Brevis | Papua New Guinea, Brazil, Chile, Argentina, South Africa |
| Bréf | Algeria |