Ravasna was the demon king of Lanka or Ceylon, from which he expelled his half-brother Kuvera. He was son of Visravas by his wife Nikasha, daughter of the Rakshasa Sumali. He was half-brother of Kuvera, and grandson of the Rishi Pulastya; and as Kuvera is king of the Yakshas, Ravana is king of the demons called Rakshasas. Pulastya is said to be the progenitor, not only of Ravana, but of the whole race of Rakshasas.
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