One Name, Two Goddesses, a Dispute Macrobius Would Not Settle

Macrobius records a genuine dispute among Roman antiquarians over who Maia actually was, and rather than resolve it his own account preserves both sides. The antiquarian Cincius argued that the goddess who received a flamen's sacrifice on the Kalends of May was the consort of Vulcan, an old Italian earth goddess honored for the fertility of the fields, and he grounded the claim in the rite itself: a sacrifice performed by Vulcan's own priest, he reasoned, must address Vulcan's own partner. Other writers took the opposite view, identifying this Maia outright with the Greek Pleiad of the same name, eldest of the seven daughters of Atlas and Pleione, mother by Zeus of Hermes, carried into Roman religion as Mercury's mother once Hermes and Mercury were themselves identified with one another.

The two candidates could hardly differ more in character: an old chthonic earth goddess bound to a fixed Roman festival on one side, a Greek mythological figure imported for the sake of a son's genealogy on the other, and nothing in the surviving sources forces a choice between them. What is certain is only that Roman religious practice held both ideas at once under a single name and a single festival date, and that ancient scholars were already arguing about which reading was original by the time Macrobius set his own account down, centuries after the rite itself was already old. Mercury's own descent, as this atlas records it, follows the Greek-derived reading, since that is the account his own entity record carries; the older, cult-bearing Maia of the Volcanal remains a distinct strand the shared name was never fully able to keep apart.