Aeval was a Celtic faerie queen of northern Munster. She was part of the Tuatha Dé Danann tribe and associated with the O’ Brien Clan. She Became the Banshee of the O’Brien Family and began her lament whenever one of the family members died. Her name means beautiful. She made Craig Liath her home which mean Gray Rock. She held a midnight court to determine if Husbands were satisfying their wives sexual needs. When found to be remiss the husband would to ordered to over come there prudishness and give their wives what they need.
Aeval had a lover once who was a servant of Murchadh named Dudhlaing Ua Artigan. Murchadh was the eldest son of Brian Boru. Aeval placed a druid mist around her lover to ensure that he would not go into battle in the Battle of Clontarf and be killed. Aeval went to Brian Boru’s tent to tell him that he would be victorious in battle but that he would loose his own life and the first son to visit him in his tent would become king. Brian sent for his eldest son Murcahd, but Murchadh decided to delay to change clothing. So instead his other son Donnchadh was the first to enter the tent. Murchadh went into battle with Dudhlaing, and they struck their enemies a mighty blow on either side. Murchadh said they he heard the sound of Dudhlaing’s blows but could not see him. It seems that Dudhlaing did not want to keep the magick mist about him when Muchadh could not see him, so he withdrew from the druid cloack. They went to the plain where Aeval was because they thought she could give them news of the battle. Aeval pleaded with the two men to stop and stay away from the battle. Murchadh refused and said that fear of his mortality would not keep him from going into battle, and that if he fell, he would bring the enemy down with him. She pleaded with Dudhlaing that if he stayed with her he would know 200 years of happiness to which he replied that he will not soil his good name for gold or silver. Aeval told the two men that they would fall in battle and that by tomorrow your blood will be spilt on the plains.
Aeval had a harp whose music was sweet and beautiful, but deadly to mortals. It is said that whoever heard the music of the harp would die shortly afterwards. The harp did not have to be strummed or plucked by her. It would play whatever it was told to play by her. The victims of her harp were usually young men. It is said that she gifted her harp to the son of Meardha when he was learning at the school of the Sidhe at Connacht. He learned that his father had been killed by the King of Lochlann. The son of Meardha went to where the three sons of the King of Lochlann were, and played his harp. The three sons died shortly afterward.