Surname Bü (Bü 
) , in the entire world, is a rare family name. The surname Bü is habitual in Myanmar, where it is a rare surname, Germany, and Switzerland, where it is a very rare surname. Likewise, Bü is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bü | Myanmar, Turkey, Mexico, Switzerland, Germany |