In Greek mythology, Pireus (Ancient Greek: Πειρέως) or Peireus was the father of Autonoe who became the mother of Palaemon by the hero Heracles.Apollodorus, 2.7.8
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References
Apollodorus, The Library with an English Translation by Sir James George Frazer, F.B.A., F.R.S. in 2 Volumes, Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1921. ISBN 0-674-99135-4. Online version at the Perseus Digital Library. Greek text available from the same website.