The Morrigan is a goddess of battle, strife, and fertility. Her name translates as either "Great Queen" or "Phantom Queen," and both epithets are entirely appropriate for her. The Morrigan appears as both a single goddess and a trio of goddesses.
Brigid: Irish & Celtic deity of all things perceived to be of relatively high dimensions & of higher knowledge (wisdom, crafts, excellence in warfare, etc.) Daughter of the Dagda. Consort of Bres. and is considered a triple goddess. Welsh equivalent is Fraid, Scottish is Brìghde/Brìde, Gaulish is Brigindū, & British is Brigantia.
VIVIAN is one of the many names of the "Lady of the Lake" in the Arthurian legends. "Lady of the Lake" may have been a title that was applied to a priestess. Or it may represent memories of a Celtic lake Goddess or fairy. She is also Nimue of the sacred groves and one of the four queens who bore Arthur away to the Isle of Avalon after he was mortally wounded. Her realm is Fate and the land of the dead or Otherworld. (read more: http://www.thaliatook.com/AMGG/vivian.php)