[2] According to tradition, his grandfather, Lóegaire Lorc, had been High King, but was treacherously killed by his brother Cobthach Cóel Breg.
According to the Lebor Gabála Érenn, Labraid was exiled overseas, and after thirty years made peace with Cobthach and was given the province of Leinster.
In one, a prose tale in the Book of Leinster, Cobthach held an assembly in Tara, and asked who the most generous man in Ireland is.
Craiftine played a slumber-strain on his harp to put her completely to sleep, and Labraid spent the night with Moriath.
With the aid of 150 pairs of bellows, he burns the house down, and Cobthach and 700 of his men, along with Labraid's mother and jester, are roasted to death.
The jester had been promised that his family would be freed, and Labraid's mother was happy to die for the sake of her son's honour.
[3] The story is told, similar to a legend of the Greek king Midas, that Labraid had horse's ears, something he tried to keep a secret.
[4] In the oral folklore surrounding St Brigid, there is a tale of a King of Leinster who always wore his hair long to hide his ears, which were those of an ass.
[6] The afflicted king sent word to St Brigid, who came to him and told him to sit in a chair and place his head in her lap.