Family name Керер (Kehrer 
, Kerer 
, Керер 
) , in all the world, is quite a common surname. The family name Керер is characteristic of Austria, where it is quite a rare surname, Germany, and Israel, where it is a rare surname. Not in comparison with a country's population, it is commonest in Germany, the United States, and Austria. Much less frequently, Керер is the forename as well as the last name.