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Last name Olu (Olu , オル , Olun ) , in the world, is a common cognomen. The surname Olu is characteristic of Nigeria, where it is quite a common surname, Iceland, where it is quite a rare surname, and Ghana. Not in comparison with a country's population, this name is the most popular in Nigeria, Ghana, and Indonesia. Likewise, Olu is the forename as well as the last name.