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Son of Muirchertach mac Néill, King of Ireland and Flann ingen Donnchaid Father of Murchad O'Neill Brother of Melkorka Mýrkjartansdóttir mac Néill and Domnall Ó Néill, High King of Ireland
http://fmg.ac/Projects/MedLands/IRELAND.htm#Muirchertachdied943A