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Worldwide, Seivan (Seivan ) is a very rare masculine first name. Much less frequently, Seivan is the last name as well as the forename.
Сейван, សីវ៉ាន, and សីវ៉ាន់
Murad, Samuel, Hunter, Behdinan, Volfson, Munusamy, Carvalho, Hosseini, Schooling, Moradkhani, and Engelhardt