Fiannaíocht

The Fenian Cycle (/ˈfiːniən/) or the Fiannaíocht (Irish: an Fhiannaíocht ), also referred to as the Ossianic Cycle /ˌɒʃiˈænɪk/ after its narrator Oisín, is a body of prose and verse centring on the exploits of the mythical hero Fionn mac Cumhaill (Old, Middle, Modern Irish: Find, Finn, Fionn) and his warriors the Fianna. It is one of the four major cycles of Irish mythology along with the Mythological Cycle, the Ulster Cycle, and the Historical Cycle. Put in chronological order, the Fenian cycle is the third cycle, between the Ulster and Historical cycles. The cycle also contains stories about other famous Fianna members, including Diarmuid, Caílte, Oisín's son Oscar, and Fionn's enemy, Goll mac Morna.

Cormac mac Art, the High King of Ireland formed the Fianna, a coalition of clans, for the protection of the kingdom. The Fianna was dominated by Clan Bascna, led by Cumhal, and Clan Morna, led by Goll, with Liath Luachra, the treasurer. After the Battle of Knock, Cumhal is killed by the Morna, and Clan Bascna's treasure bag is stolen. Cumhal's wife, Muirne, runs away and has a son, Demna, who is cared for by two warrior women, Liath and the druidess Bodhmall. Muirne marries the king of Kerry.

...
Wikipedia