In Greek mythology, the name Periclymenus /ˌpɛrᵻˈklɪmᵻnəs/ (Ancient Greek: Περικλύμενος Periklymenos) may refer to:
A son of Neleus (the son of Poseidon) and Chloris. He was one of the Argonauts. His grandfather, Poseidon gave him the ability to shapeshift into various animals. He was killed by Herakles at Pylos, although he tried to escape in the form of an eagle. His offspring were Erginos and Penthilos.
A defender of Thebes against the Seven and would-be murderer of Amphiaraus in the battle for Thebes. Amphiaraus was swallowed by the earth before he could kill him though. It was either this Periclymenus or Asphodicus that killed Parthenopaeus
A suitor of Penelope, from Zacynthus.
In The Son of Neptune, the second book in the Heroes of Olympus series, Frank Zhang is revealed to be a descendant of Periclymenus (and thus a legacy of Poseidon) and has the same ability to shape-shift.
