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Last name Thair (ثائر , Thair ) , across the world, is a common family name. The surname Thair is characteristic of Western Asia, particularly Iraq, where it is quite a common surname, Syria, and Jordan, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Iraq, Pakistan, and Syria. Predominantly, Thair is the forename as well as the last name.