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Family name Fergusson (ファーガソン , Fergusson , فيرجسون) , worldwide, is quite a common cognomen. The surname Fergusson is characteristic of Barbados, where it is quite a common surname, New Zealand, where it is quite a rare surname, and Trinidad and Tobago. Measured by absolute frequency, it most frequently occurs in the United Kingdom, Australia, and the United States. Much less frequently, Fergusson is the forename as well as the last name.