Helbig, _Die Italiker in der Poebene_, 71.
Was the name of this month taken from a deity Maia, or had it originally only a signification of _growing_ or _increasing_, such as we might expect in a word derived from the same root as _maior_, _maiestas_, &c.? The following passage of Macrobius will show how entirely the Roman scholars were at sea in their answer to this question[363]:
‘Maium Romulus tertium posuit. De cuius nomine inter auctores lata dissensio est. Nam Fulvius Nobilior in Fastis quos in aede Herculis Musarum posuit[364] Romulum dicit postquam populum in maiores iunioresque diuisit, ut altera pars consilio altera armis rem publicam tueretur, in honorem utriusque partis hunc Maium, sequentem Iunium mensem uocasse[365]. Sunt qui hunc mensem ad nostros fastos a Tusculanis transisse commemorent, apud quos nunc quoque uocatur deus Maius, qui est Iuppiter, a magnitudine scilicet ac maiestate dictus[366]. Cingius[367] mensem nominatum putat a Maia quam Vulcani dicit uxorem, argumentoque utitur quod flamen Vulcanalis Kalendis Maiis huic deae rem diuinam facit. Sed Piso uxorem Vulcani Maiestam non Maiam dicit uocari. Contendunt alii Maiam Mercurii matrem mensi nomen dedisse, hinc maxime probantes quod hoc mense mercatores omnes Maiae pariter Mercurioque sacrificant[368]. Adfirmant quidam, quibus Cornelius Labeo consentit, hanc Maiam cui mense Maio res diuina celebratur terram esse hoc adeptam nomen a magnitudine, sicut et Mater Magna in sacris uocatur adsertionemque aestimationis suae etiam hinc colligunt quod sus praegnans ei mactatur, quae hostia propria est terrae. Et Mercurium ideo illi in sacris adiungi dicunt quia uox nascenti homini terrae contactu datur, scimus autem Mercurium uocis et sermonis potentem. Auctor est Cornelius Labeo huic Maiae id est terrae aedem Kalendis Maiis dedicatam sub nomine Bonae Deae et eandem esse Bonam Deam et terram ex ipso ritu occultiore sacrorum doceri posse confirmat. Hanc eandem Bonam deam Faunamque et Opem et Fatuam pontificum libris indigitari, &c.’
It is clear from this passage that the Romans themselves were not agreed, either in the case of May or June, that the name of the month was derived from a deity. No Roman scholar doubted that Martius was derived from Mars, the characteristic god of the Roman race; but Maia was a deity known apparently only to the priests and the learned. Had she been a popular one, what need could there have been to question so obvious an etymology? And if she were an obscure one, how could she have given her name to a month? As a matter of fact March is the only month of which we can be sure that it was named after a god. Even January is doubtful, June still more so. The natural assumption about this latter word would be that it comes from Juno, more especially as we find in Latium the words Junonius and Junonalis as names of months[369]. But if Junius came from Juno, it must have come by the dropping out of a syllable; and this, in the case of a long and accented _o_, would be at least unlikely to happen[370]. Nor can we discover any sufficient reason why the month of June should be called after Juno; none at any rate such as accounts for the connexion of Mars with the initial month of the year. This is enough to show that the derivation of June from Juno must be left doubtful; and if so, certainly that of May from Maia. In the case of this month, not only does the natural meaning of mensis Maius suit well as following the mensis Aprilis, but there is no cult of a deity Maia which is found throughout the month.