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Family name Dinku (Dinku ) , in the world, is a common surname. The family name Dinku is habitual in Ethiopia, where it is quite a common surname, Botswana, where it is quite a rare surname, and Lebanon, where it is a rare surname. Not in comparison with a country's population, it is commonest in Sub-Saharan Africa, particularly Ethiopia, Ghana, and Botswana. Likewise, Dinku is the forename as well as the last name.