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Family name Agaba (Agaba ) , all over the world, is a common surname. The surname Agaba is characteristic of Sub-Saharan Africa, particularly Uganda, where it is quite a common surname, Nigeria, where it is quite a rare surname, and Rwanda. Not in comparison with a country's population, it is the most numerous in Uganda, Nigeria, and Algeria. Also, Agaba is the forename as well as the last name.