Family name باير (Bayer 
, Beyer , Baer , and others...) , globally, is a widespread cognomen. The surname باير is characteristic of Germany, where it is a common surname, Marshall Islands, and Vanuatu (explore the name in all countries). Measured by absolute frequency, it is commonest in Germany, the United States, and Turkey. Very seldom, باير is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Beyer, Bayer, Baer | Germany, Austria, Philippines, United States, Turkey |
| Baier | Germany, Austria, Philippines, Brazil, United States |
| باير | Palestinian Territory, Iran, Syria, Iraq, Jordan |