Cognomen Gerh (Gerh 
) , in the entire world, is a rare last name. The cognomen Gerh is characteristic of Bosnia and Herzegovina, where it is quite a rare surname, Germany, where it is an extremely rare surname, and the United States. Measured by absolute frequency, the name is most common in Bosnia and Herzegovina, India, and the United States. Much less frequently, Gerh is the forename as well as the last name.