Niall Noígíallach (Nye-al Nee-Gal-ach) – High King during the middle of the fifth century in Ireland, also known as the Ard-Rì; the ancestor of the Uí Néill dynasty, which governed significant parts of the Emerald Isle for many centuries; his son, Lóegaire Mac Néill, would likely have followed him as the next High King if not for infighting between the provinces; son of Caireen and mated to Rignach.