Cognomen Герч (Gertsch 
, Герч 
) , throughout the world, is quite a rare last name. The last name Герч is habitual in Switzerland, where it is quite a common surname, Finland, where it is a rare surname, and Israel. Measured by absolute frequency, it is the most numerous in Switzerland, the United States, and Kenya. Much less frequently, Герч is the forename as well as the last name.