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All over the world, سیاوش (Siavash , سیاوش ) is quite a rare boy's first name. The forename سیاوش is habitual in Iran, where it is quite a rare male name, Afghanistan, and United Arab Emirates, where it is a rare masculine name. Measured by absolute frequency, it is the most numerous in Iran, Afghanistan, and the United States. Much less frequently, سیاوش is the last name as well as the forename.