Cognomen Герль (Gerl 
, Guerle 
, Guerl ) , all over the world, is quite a rare last name. The cognomen Герль is habitual in Austria, where it is quite a rare surname, Slovenia, and Germany. In absolute terms, this name is the most popular in Germany, Austria, and the United States. Very seldom, Герль is the forename as well as the last name.