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Surname Uba (Uba , Obat , Уба ) , throughout the world, is a common last name. The family name Uba is characteristic of Nigeria, where it is quite a common surname, Estonia, where it is quite a rare surname, and Philippines. Not in comparison with a country's population, it is commonest in Nigeria, India, and Philippines. Also, Uba is the forename as well as the last name.