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Cognomen สิบสอง (Twev , สิบสอง , Sipprang ) , all over the world, is a rare family name. The surname สิบสอง is characteristic of Myanmar, where it is a rare surname, Switzerland, where it is a very rare surname, and Spain. Measured by absolute frequency, the name is most common in Myanmar, Indonesia, and Spain. Very seldom, สิบสอง is the forename as well as the last name.