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Last name Bair (贝尔 , Баир , Bair ) , in the world, is a widespread cognomen. The last name Bair is habitual in Brunei, where it is quite a common surname, India, where it is quite a rare surname, and Jamaica. Not in comparison with a country's population, the name is most common in India, the United States, and China. Very seldom, Bair is the forename as well as the last name.