Cognomen Харрер (Harrer 
, Харрер 
) , throughout the world, is quite a common surname. The surname Харрер is habitual in Austria, where it is quite a common surname, Germany, where it is quite a rare surname, and Hungary. In absolute terms, this name is the most popular in Germany, Austria, and the United States. Much less frequently, Харрер is the forename as well as the last name.