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Last name Prasa (Prasa , ประสะ , ประสา ) , in the entire world, is quite a common cognomen. The last name Prasa is characteristic of Sri Lanka, where it is quite a rare surname, Oman, where it is a rare surname, and India. In absolute terms, it is commonest in India, Sri Lanka, and Spain. Also, Prasa is the forename as well as the last name.