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Family name Ngongo (Ngongo , Нгонго ) , in the entire world, is a common cognomen. The cognomen Ngongo is habitual in Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is quite a common surname, Namibia, where it is quite a rare surname, and the Republic of the Congo. Measured by absolute frequency, it most frequently occurs in the Democratic Republic of the Congo, Indonesia, and Angola. Much less frequently, Ngongo is the forename as well as the last name.