Various Greek myths account for Skylla's origins and fate. According to some, she was one of the children of Phorcys and Keto. Other sources, including Stesichorus, cite her parents as Triton and Lamia. According to John Tzetzes and Servius' commentary on the Aeneid, Skylla was a beautiful naiad who was claimed by Poseidon, but the jealous Amphitrite turned her into a monster by poisoning the water of the spring where Skylla would bathe.