the Tale of Virgo
The Romans had simply adopted an earlier Greek goddess, Demeter. This goddess of agriculture was of the highest birth: born to Cronus and Rhea, she was the sister of Zeus. As evidence of her antiquity in Greek lore, her name has been found on a tablet from Pylos dating to the thirteenth century B.C.
Demeter was said by Homer to have "lain with Iasion in a thrice-plowed field", the result of which was the birth of Plutus, whose name translates as "riches from the soil" (perhaps "cornucopia" would be an appropriate description).
The goddess was depicted then, as now, as carrying a sheaf of wheat. But her influence carried not only to cereal crops, but to all kinds of food crops. Not surprisingly, perhaps, she was also the goddess of health, and of births and marriages."
Source: the Constellations