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Cognomen Jargon (Jerga , Jargon , Jargoon ) , around the world, is a rare surname. The cognomen Jargon is characteristic of Slovakia, where it is quite a rare surname, Czechia, where it is a rare surname, and Germany. Not in comparison with a country's population, the name is most common in Slovakia, Germany, and Ethiopia. Likewise, Jargon is the forename as well as the last name.