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Family name Gummer (Gummer , Гуммер , غومر) , in the entire world, is quite a rare last name. The cognomen Gummer is characteristic of New Zealand, where it is a rare surname, the United Kingdom, and Denmark. Not in comparison with a country's population, the name is most common in the United Kingdom, the United States, and Germany. Much less frequently, Gummer is the forename as well as the last name.