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Family name Byam (ביאן , Byam ) , in the world, is quite a rare last name. The cognomen Byam is habitual in Latin America and the Caribbean, particularly Grenada, where it is quite a common surname, Trinidad and Tobago, where it is quite a rare surname, and Panama, where it is a rare surname. In absolute terms, it most frequently occurs in the United States, Canada, and Trinidad and Tobago. Also, Byam is the forename as well as the last name.