It appears that this is the wrong daughter for Eochaid Rinnavel mac Domangairt, Rí na Dál Riata, unless someone got confused and put her daughter's married name in as her surname. She should be Fland ingen (daughter of) Eochaid, or alternately Fland mac Selbach, as her husband was Feradach mac Selbach, King of Loarn.
Amy
