TROKHILOS (or Trochilus) was a demi-god or hero of the Eleusinian Mysteries who seems to have presided over the sacred mill-wheel. His son was Triptolemos, the "husk-pounder." Trokhilos' own name was probably derived from the words trokhos, the wheel, and trochazô, to turn like a wheel. Trokhilos is perhaps the same as Dolikhos, an Eleusinian lord mentioned in the Homeric Hymn to Demeter.

Homeric Hymn 2 to Demeter (trans. Evelyn-White) (Greek epic C7th or 6th B.C.) :
"[Demeter, disguised as an old woman, arrived in Eleusis where she is met by Kallidike who recites the names of the Eleusinian lords:] But now I will teach you clearly, telling you the names of men who have great power and honour here [in Eleusis] and are chief among the people, guarding our city's coif of towers by their wisdom and true judgements: there is wise Triptolemos and Dioklos and Polyxeinos and blameless Eumolpos and Dolikhos [Trokhilos?] and our own brave father [King Keleos]."

Pausanias, Description of Greece 1. 14. 2 (trans. Jones) (Greek travelogue C2nd A.D.) :
"It is said, then, that when Demeter came to Argos she was received by Pelasgos into his home, and that Khrysanthis, knowing about the rape of Kore, related the story to her. Afterwards Trokhilos, the priest of the mysteries, fled, they say, from Argos because of the enmity of Agenor, came to Attika and married a woman of Eleusis, by whom he had two children Eubouleos and Triptolemos. That is the account given by the Argives."

Sources:

• The Homeric Hymns - Greek Epic C8th-4th B.C.
• Pausanias, Description of Greece - Greek Travelogue C2nd A.D.