Last name Jerga (Jerga 
, Jargon 
, Gergon 
) , globally, is a rare cognomen. The cognomen Jerga is habitual in Slovakia, where it is quite a rare surname, Czechia, where it is a rare surname, and Germany. Measured by absolute frequency, this name is the most popular in Slovakia, Germany, and Ethiopia. Likewise, Jerga is the forename as well as the last name.