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Surname Thayer (ثاير
, Thayer
, Тайер
) , around the world, is a common family name. The surname Thayer is habitual in the United States, where it is quite a rare surname, Israel, and Panama. Measured by absolute frequency, the name is most common in the United States, Iraq, and Canada. Much less frequently, Thayer is the forename as well as the last name.