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Surname Boko (Boko , Book , Боко ) , in all the world, is a common cognomen. The family name Boko is habitual in Benin, where it is quite a common surname, Ivory Coast, where it is quite a rare surname, and Croatia. In absolute terms, the name is most common in the United States, the Democratic Republic of the Congo, and Benin. Very seldom, Boko is the forename as well as the last name.