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Cognomen Susin (Susin , สุสิน , Сусин ) , across the world, is quite a rare family name. The surname Susin is characteristic of Slovenia, where it is quite a rare surname, Brazil, where it is a rare surname, and Spain. Measured by absolute frequency, the name is most common in Brazil, Indonesia, and Russia. Much less frequently, Susin is the forename as well as the last name.