— Connor, Prior or Dean of Down, [353], [364]

Magnus, King of Norway, [29]

Maguire, chief of Fermanagh, [119]

— Cuconnacht, chief of Fermanagh, [154], [162], [187]

— Shane, chief of Fermanagh, [239], [377]

Mahon, King of Munster, [22]-[23]

Makeon, or Bisset, [71]

Malachi, St., Archbishop of Armagh, [15], [35], [314]

— King of Meath in 845, [18]

— King of Meath and of Ireland, [21], [23];