According to Hyginus, Pleisthenes was raised by Atreus's brother Thyestes, accompanied Thyestes into exile, and was sent by Thyestes to kill Atreus. Not realizing that he was the young man's father, Atreus killed Pleisthenes.[4]
Agamemnon and Menelaus are commonly considered the sons of Atreus; hence they are often given the name Atreidai, or "the sons of Atreus". One explanation for this discrepancy is that, after the early death of Pleisthenes, Atreus raised his grandsons, the sons of Pleisthenes, as his own sons.[5]
^Tzetzes, John (2015). Allegories of the Iliad. Translated by Goldwyn, Adam; Kokkini, Dimitra. Harvard University Press, Cambridge, Massachusetts, London, England: Dumbarton Oaks Medieval Library. pp. 39, Prologue 511. ISBN978-0-674-96785-4.
^Aeschylus, Agamemnon 1602; see also Agamemnon 1569.
Hesiod, Catalogue of Women from Homeric Hymns, Epic Cycle, Homerica translated by Evelyn-White, H G. Loeb Classical Library Volume 57. London: William Heinemann, 1914. Online version at theio.com
Tzetzes, John, Allegories of the Iliad translated by Goldwyn, Adam J. and Kokkini, Dimitra. Dumbarton Oaks Medieval Library, Harvard University Press, 2015. ISBN978-0-674-96785-4