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Surname Tahan (Tahan , طحان , Тахан ) , in the world, is a common last name. The last name Tahan is habitual in Western Asia, particularly Lebanon, where it is quite a common surname, Syria, and Kuwait. Not in comparison with a country's population, the name is most common in Syria, Lebanon, and Iran. Much less frequently, Tahan is the forename as well as the last name.