Note 9 — Chapter V · THE CULT OF SOULS
W. B. (William Bernard) Hillis translation
The name Τρεφώνιος, Τροφώνιος itself also points to the fact that assistance to the fertility of the earth was expected of this Ζεὺς χθόνιος. In the later cult of Trophonios not a trace of such a belief survives.