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Cognomen Otha (Otha ) , in the world, is quite a rare family name. The last name Otha is characteristic of Gabon, where it is quite a common surname, the Democratic Republic of the Congo, where it is a rare surname, and Malaysia. Not in comparison with a country's population, this name is the most popular in India, the Democratic Republic of the Congo, and Gabon. Also, Otha is the forename as well as the last name.