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Last name Guyer (جوير , Гайер , Guyer ) , globally, is quite a common surname. The last name Guyer is characteristic of Jersey, where it is quite a common surname, Switzerland, where it is quite a rare surname, and the United States. In absolute terms, this name is the most popular in the United States, Switzerland, and Kazakhstan. Much less frequently, Guyer is the forename as well as the last name.