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Surname Nko (Nko ) , in all the world, is quite a common cognomen. The last name Nko is characteristic of Sub-Saharan Africa, particularly Lesotho, where it is quite a common surname, Botswana, where it is quite a rare surname, and Cameroon. Measured by absolute frequency, it most frequently occurs in Sub-Saharan Africa, particularly Nigeria, the Democratic Republic of the Congo, and Tanzania. Very seldom, Nko is the forename as well as the last name.