In Greek mythology, Caucon (Ancient Greek Καύκων) is the Eleusinian son of Celaenus and grandson of Phlyus who brought the rites of the Great Goddesses from Eleusis to Andania in Messene. Pausanias ties him to the first establishment of the feast under Polycaon and Messene, later heightened by Lycus son of Pandion.
Adapted from Wikipedia, "Caucon" · CC BY-SA 4.0
I.Bringer of the Andanian mysteries
Pausanias (4.1.5, 4.1.8–9, 4.2.6) makes Caucon son of Celaenus son of Phlyus the teacher who carried Demeter's Great Goddesses from Eleusis to Messene the wife of Polycaon. An Andanian inscription names him as the one who set the feast on the spot where the pair lived; Lycus later raised the same rites to greater honour.
Legend also has him appear to Epaminondas in a dream promising success in restoring Messenia (Pausanias 4.27.6).
II.Homonym care
Wikipedia's Caucon page also lists an Arcadian son of Lycaon, eponym of the Caucones, slain with his brothers by Zeus. The atlas id caucon-messene is the Eleusinian–Andanian hierophant alone.