In Greek mythology, Polynoe () was one of the 50 Nereids, marine-nymph daughters of the 'Old Man of the Sea' Nereus and the Oceanid Doris.Hesiod, Theogony 258 Her name means 'giver of reason' or 'richness of mind, thoughtful'.
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References Hesiod, Theogony from The Homeric Hymns and Homerica with an English Translation by Hugh G. Evelyn-White, Cambridge, MA., Harvard University Press; London, William Heinemann Ltd. 1914. Online version at the Perseus Digital Library. Greek text available from the same website. Kerényi, Carl, The Gods of the Greeks, Thames and Hudson, London, 1951.