Last name באייר (Bajer 
, Bayer , באייר 
) , in the entire world, is a common surname. The cognomen באייר is habitual in Vanuatu, where it is a common surname, Austria, where it is quite a common surname, and Germany (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Germany, the United States, and Turkey. Much less frequently, באייר is the forename as well as the last name.