Legend of Aoife
Pronunciation: Eee-fah
Meaning: probably derived from the Gaelic aoibh which means beauty, joy and radiance
Legend:
Aoife is hugely significant in Irish mythology, where several powerful women bear the name and associated characteristics.
In the Ulster Cycle of tales in Irish mythology, Aoife (or Aífe), the daughter of Airdgeimm and sister of Scathach, was a great warrior princess who, in a war against her sister, was defeated in single combat by the hero Cú Chulainn and eventually became the mother of his only son, Connlach.
In the Fate of the Children of Lir or Oidheadh Chlainne Lir, Aoife was the second wife of Lir, who cruelly turned her stepchildren into swans.
Source: Wikipedia
Further reading:
The Raid: A Dramatic Retelling of Ireland's Epic Tale (Ulster Cycle Book 1)