Cognomen Goncz (Goncz 
) , all around the world, is quite a rare surname. The surname Goncz is characteristic of Eastern Europe, particularly Hungary, where it is quite a rare surname, Slovakia, where it is a rare surname, and Poland. Not in comparison with a country's population, it is the most numerous in Hungary, Poland, and the United States. Also, Goncz is the forename as well as the last name.