Polydamna (; ) is an Egyptian figure from Greek mythology.
Mythology Mentioned in Homer’s Odyssey,Homer. Odyssey 4.228 Polydamna was the wife of Thōn (, gen: ), often known as "Thon the Egyptian", owing to his Egyptian heritage. Polydamna gave Helen, wife of Menelaus, nepenthe (i.e., a drug that has "the power of robbing grief and anger of their sting and banishing all painful memories") and which Helen slipped into the wine that Telemachus and Menelaus were drinking.
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References
Homer, The Odyssey with an English Translation by A.T. Murray, PH.D. in two volumes. Cambridge, MA., Harvard University Press; London, William Heinemann, Ltd. 1919. . Online version at the Perseus Digital Library. Greek text available from the same website.