Suggestion on one website, http://piereligion.org/mayday2.html#furry ~~

"Poor Aunt Mary Moses was surely once Saint Mary, but she got desainted after the Reformation in England. Before that she was probably a version of the Pagan Goddess of spring, almost certainly Freya. And if you don't happen to be in England, you can ask her to send "peace through all the land."

All speculative, I guess; but probably as good a guess as any.

This website, BTW, explicitly quoting the Watersons' version as reference, includes unquestioned the "Take no scorn to wear the horn" verse, showing that the poster had not taken on board my post above, 24 Sep 10, 0406 AM, where I state on the authority of Norma herself that the Watersons got that verse from Shax's As You Like It because they thought it sounded good there. It does not appear in any of the traditional on-the-spot or field recordings I have ever heard.

~M~