Birog
A Druidess in ancient Irish legend. The Fomorian king
Balor had a beautiful daughter named Ethlinn whom he kept
imprisoned because of a Druidic prophecy that he would be
slain by his grandson. Balor had stolen a magical cow from
three brothers, Kian, Sawan, and Goban.
Through the magical spells of Birog, Kian, disguised as a
woman, was able to enter the tower where Ethlinn was imprisoned.
He then slept with Ethlinn, who in due course delivered
three sons at one birth. Balor commanded them to be drowned,
but one of them, named Hugh, survived, and in the course of
time fulfilled the Druidic prophecy and slew Balor.