In Greek mythology, Geraestus or Geraistos (Ancient Greek: Γεραιστός) may refer to two personages:

• Geraestus, son of Zeus and brother of Taenarus and Calabrus. The three brothers were said to have sailed to Peloponnese and to have seized a portion of land there.^[1]
• Geraestus, a Cyclops on whose grave in Attica Hyacinthus of Lacedaemon had his daughters Aegleis, Antheis, Lytaea, and Orthaea were sacrificed.^[2]

• 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.
• Stephanus of Byzantium, Stephani Byzantii Ethnicorum quae supersunt, edited by August Meineike (1790-1870), published 1849. A few entries from this important ancient handbook of place names have been translated by Brady Kiesling. Online version at the Topos Text Project.