Seachnasach's genealogy lists him as ten generations removed from Máine Mór, the founder of Uí Maine: "Sechnasaigh, mic Congail, mic Eogain, mic Comain, mic Brenaind Daill, mic Cairpri Feichine, mic Fearadaig, mic Luigdheach, mic Dallain, mic Bresail, mic Máine Móir." This includes him among the Clann Comain sept of the dynasty.
The annals merely report his death. No details are given.
Fithceallach mac Flainn
|King of Uí
Dluthach mac Fithcheallach