Aibell

In Irish legend Aibell (sometimes Aoibheall (modern Irish spelling), also anglicised as Aeval) was the guardian spirit of the Dál gCais, the Dalcassians or Ó Bríen clan. She was the ruler of a sídhe in north Munster, and her dwelling place was Craig Liath, the grey rock, a hill overlooking the Shannon about two miles north of Killaloe. Aibell also had a lover (called Dubhlainn Ua Artigan) and a magic harp (of which it was said "[w]hoever heard its music did not live long afterwards").

The name Aoibhell may come from Gaelic aoibh, meaning "beauty" (or aoibhinn "beautiful"). Alternatively, as a theonym it could be derived from Proto-Celtic *Oibel-ā, literally "burning fire", which may have been a byword for the notion of "ardour"; the Romano-British equivalent of this Proto-Celtic theonym is likely to have been *Oebla. A variant name for the character is Áebinn.

In Seán Ó Seanacháin's song An Buachaill Caol Dubh, Aoibheal appears to the "Dark Slender Boy" (representing alcohol addiction) and his friend the drinker. In the last verse Seanacháin expands by saying that, when Aoibheal met the two of them walking the road, she promised the lad a hundred men if he would let go of the poet. The lad replied that he was steadfast and true and would not desert his friends until they died. Thus Seán acknowledges his addiction will never disappear.

AND Aoibhell, another woman of the Sidhe, made her dwelling-place in Craig Liath, and at the time of the battle of Cluantarbh she set her love on a young man of Munster, Dubhlaing ua Artigan, that had been sent away in disgrace by the King of Ireland. But before the battle he came back to join with Murchadh, the king's son, and to fight for the Gael. And Aoibhell came to stop him; and when he would not stop with her she put a Druid covering about him, the way no one could see him.

...
Wikipedia