In Greek mythology Agreus or Argeus is one of the Pans, creatures descended from Pan. They are human in shape, but have the heads of horned goats. His brother was Nomios. Both were the sons of Hermes, Argeus' mother being the nymph Sose, a prophetess: he inherited his mother's gift or prophecy, and was also a skilled hunter. Nomios' mother was Penelope (not the same as the wife of Odysseus). He was an excellent shepherd and musician upon the shepherd's pipes. Both of these Pans, along with a dozen others, joined Dionysus in his wars in India.[1] Both Agreus (meaning "hunter") and Nomios (meaning "shepherd") are titles of several agricultural gods, including Aristaeus[2] and Pan himself.
Agreus was also the name of several other mythological characters.