Surname Биюн (Bijun 
, Biyun 
, Биюн 
) , worldwide, is a rare family name. The last name Биюн is characteristic of Malaysia, where it is a rare surname, Singapore, and Bulgaria. In absolute terms, it most frequently occurs in China, Malaysia, and Indonesia. Much more frequently, Биюн is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Bijun | Taiwan, Japan, China, Malaysia, India |
| Biyun | China, Indonesia, United States, Malaysia, India |
| Биюн | Russia, Kazakhstan |