M
- Mailcon, PC; Melcon, IN; Maelchon, T; father of Brude.
- Genitive of Mailchu, an Irish form. In Irish Life of Saint Columba Brude has a son Mailchu.
- Compare Milchu in Ireland in Life of Saint Patrick.
- Morbet, PC; Mor Breac, IN; epithet of Nechtan.
- Irish Mor, great; Breac, speckled.
- Morleo, PC, IN, in list of kings.
- Muircholaich, PC; Murtholoic, IN; father of Talorg.
- Muir or Mur enters largely into Irish names. Compare Murchadh, etc., FM.
- Munait, PC; Munaith, IN; Moneit, T; father of Drest.
- Mund, PC; Muin, IN; one of thirty Brudes.
- Enters into Munait.
N
- Namet, PC; Navit, IN; epithet of Vipoig, termed in Latin lists Fiacha Albus.
- Irish Neimheac, glittering, shining.
- Necton, Nectu, Nechton, PC; Nectan, IN; Nechtan, T.
- Irish Nechtan, FM; preserved in Clan Neachtan or MacNaughtans. Welsh form Neithon.
- Nesanus Curvus, Ad. II. 20.
- Irish form Neasan, FM.
O
- Olfinecta, PC; Finechta, IN.
- Irish form Fineachta, FM.
- Olgudach, PC; epithet of Gede.
- Gedhe Ollgothach, king of Ireland, FM.
- Onnist, Unuist, PC; Onuis, Uidnuist, Oinuist, IN; Aengus, T.
- Cornish form, Ungust, BM; Irish, Aenghus, FM. Old Irish form, Oengus, Book of Armagh.
P
- Pant, PC; Pont, IN; one of thirty Brudes.
- Peirnn, IN, father of Im, in Pictish legend.
- Corn. Perenn, BM.
- Peanfahel, Caput valli, Bede.
- Welsh form, Penguaul, shows interchange of Gu and F in Welsh and Irish.
R
- Ru, PC, IP, one of thirty Brudes. Also in list of kings.
- Compare Rudhruidhe, FM.