Throughout the world, Баиер (Bayer 
, Baier 
, Баиер 
) is a rare dominantly masculine, but infrequently feminine first name. The first name Баиер is habitual in Israel, where it is a rare male name, Iraq, and Algeria. In absolute terms, the name is most common in Pakistan, Turkey, and Iraq. Much more frequently, Баиер is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Bayer | Germany, Turkey, Austria, United States, Brazil |
| Baier | Germany, Austria, Philippines, United States, Brazil |
| Баиер | Kazakhstan, Russia, Ukraine |
| Baiyer | Papua New Guinea, Brazil |