Family name Bireta (Bireta 
, Birreta ) , across the world, is a very rare surname. The last name Bireta is habitual in Belarus, where it is a rare surname, Poland, and the United States, where it is a very rare surname. More prevalently, Bireta is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bireta | Germany, Ethiopia, Belarus, United States, Poland |
| Birreta | United States |