Family name Биери (Bieri 
, Биери 
) , across the world, is a common surname. The cognomen Биери is habitual in Switzerland, where it is quite a common surname, the Democratic Republic of the Congo, where it is quite a rare surname, and Israel, where it is a rare surname. In absolute terms, it is the most numerous in Switzerland, the Democratic Republic of the Congo, and the United States. Very seldom, Биери is the forename as well as the last name.