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Surname Giesel (Geisel
, Giesel
) , in the entire world, is quite a common last name. The last name Giesel is habitual in Germany, where it is quite a rare surname, Nicaragua, and Switzerland. Not in comparison with a country's population, it is the most numerous in Germany, the United States, and Brazil. Much less frequently, Giesel is the forename as well as the last name.