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Surname Birhan (Birhan , بيرهان , Бирхан ) , in the world, is a common last name. The last name Birhan is characteristic of Ethiopia, where it is quite a common surname, Lebanon, where it is a rare surname, and Saudi Arabia. Not in comparison with a country's population, it most frequently occurs in Ethiopia, Sudan, and Saudi Arabia. Also, Birhan is the forename as well as the last name.