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Last name origins & meanings:

  1. Scottish (Galloway) and northern Irish: from the Scottish personal name Adair, also spelled Edʒear, a form of Edgar.
  2. James Adair (c.1709–c.1783) was an Indian trader in SC from 1735; he was born in Co. Antrim, northern Ireland. A certain Baron William Adair, from Scotland, also settled in SC at around the same period.

This name appears in the following lists: Poets