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Last name Byer (بير , باير , Byer ) , across the world, is quite a common cognomen. The cognomen Byer is habitual in Latin America and the Caribbean, particularly Barbados, where it is quite a common surname, Saint Lucia, and Trinidad and Tobago, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in the United States, Canada, and Sudan. Very seldom, Byer is the forename as well as the last name.