Nanaea
The Morrigan was considered at one time to consist of three aspects, named Nemain, Macha and Badb.
The sources I've encountered about the triple aspects of Brigid said that they were all named Brigid (or
Bride or something similar, I'll have to look it up again).
Phyllis (aka Sidhe Uaine or
Gaia Euphora)
A little side note: You might get a kick out of this one legend pertaining to Macha and the warriors of Ulster (hint, hint).