 His father, uncle, grandfather, and great-grandfather had also been kings of Cashel, so too were his son and grandson.Cathal's conflict with the Uí Néill kings, Fergal mac Máele Dúin, Flaithbertach mac Loingsig, and Áed Allán, son of Fergal mac Máele Dúin, is reported at some length in the Irish annals, and again northern and southern versions provide differing accounts.Cathal also appears as a character, not always portrayed sympathetically as in "Aislinge Meic Con Glinne" where he is possessed by a demon of gluttony, in a number of prose and verse tales in the Middle Irish language.