(μυσταγωγός/mustagōgós). An Athenian cult functionary in the Eleusinian mysteries ( Mystḗria ) who accompanied the mystae in the annual procession to Eleusis [1] , kept order and probably helped the mystae during the rites (inscriptions from the 1st cent. BC: LSCG, Suppl 15; Plut. Alcibiades 34,6). There is also evidence for this function outside Athens (Andania: IG V 1, 1390 l. 149; 92 BC); the verb derived from it, μυσταγωγεῖν/mystagōgeín), denotes an initiation (e.g. of a priest in Panamara, Caria, Syll.3 900; 4th cent. AD).
Figuratively, a mystagogos is a person…