Nielsen Hayden genealogy
Descendants of Domnall mac Cormaic
Father: Cormac mac Diarmata
Domnall mac Cormaic
   └─ Failbe mac Domnaill
    Ethne ingen Crundmael
       └─ Mugain ingen FaĆlbe
        Cellach Cualann mac Gerthide, King of Laigin ( - 715)
           │ + Murchad mac Brain Muit, King of Laigin ( - 727 Leinster, Ireland)
           └─ St. Caintigern ( - 734 Loch Lomond, Argyllshire, Scotland)