Meide ind Eoin, and Meide in Togmail: places in or near the Boyne, in the County Louth
Midluachair: Slige Midluachra, the name of the highroad east of Armagh, leading north from Tara to Emain and into the north of Ireland
Mil: the legendary progenitor of the Milesians (See Maic Miled)
Miliuc: a river in Conalle Murthemni
Moduirn: _see_ Sliab Moduirn
Moin Coltna: a bog between Slieve Bawne and the Shannon
Moraltach: great grandfather of Cuchulain
Morann: a famous judge
Morrigan: the war-goddess of the ancient Irish, "_monstrum in feminae figura_" (pronounced _More-reegan_)
Mossa: a territory, the southern part of which must have been in the barony of Eliogarty, not far from Cashel, in the County Tipperary
Muach: a river in Conalle Murthemni
Muresc: the land of Ailill's mother; Murresk Hamlet, between Clew Bay and Croagh Patrick, in the County Mayo
Murthemne: a great plain along the northern coast of the County Louth between the river Boyne and the Cooley Mountains; now belonging to Leinster, but, at the time of the Tain, to Ulster (pronounced _Muhr-hev-ny_)
Nemain: the Badb
Ness: mother of King Conchobar by Cathba; she afterwards married Fachtna Fathach and subsequently Fergus macRoig
Nith: the river Dee which flows by Ardee, in the County Louth
Ochain: the name of Conchan bar's shield
Ochonn Midi: a place near the Blackwater at Navan
Ochtrach: near Finnglassa Asail, in Meath
Oenfer Aife: another name for Conlaech
Oengus Turbech: according to the Annals of Ireland, he reigned as High King from 384 to 326 B.C.
Ord: south-east of Cruachan and north of Tiarthechta
Partraige beca: Partry in Slechta south-west of Kells, in Meath
Port Large: Waterford
Rath Airthir: a place in Connacht
Rath Cruachan: Rathcroghan, between Belanagare and Elphin, in the County Roscommon
Rede Loche: a place in Cualnge
Renna: the mouth of the Boyne
Riangabair: father of the charioteers, Laeg and Id
Rigdonn: a place in the north
Rinn: a river in Conalle Murthemni
Rogne: a territory between the rivers Suir and Barrow, in the barony of Kells, the County Kildare or Kilkenny
Ross: a district in the south of the County Monaghan
Ross Mor: probably Ross na Rig, near Ball Scena
Sas: a river in Conalle Murthemni
Scathach: the Amazon dwelling in Alba who taught Cuchulain and Ferdiad their warlike feats (pronounced _Scaw-ha_)
Selaig: Sheelagh, a townland in the barony of Upper Dundalk
Semne: Island Magee, north-east of Carrickfergus, in the County Antrim
Senbothae: Templeshanbo, at the foot of Mount Leinster, in the County Wexford
Sencha macAilella: the wise counsellor and judge of the Ulstermen
Sered: a plain in the north of the barony of Tirhugh, County Donegal
Setanta: the real name of Cuchulain
Sid: the terrene gods (pronounced _She_)
Sil: in Lecale, in the County Down
Sinann: the river Shannon
Siuir: the Suir, a river in Munster, forming the northern boundary of the County Waterford
Slabra: a place north of Selaig, near Kells, in Meath