Ath Aladh Ind: a ford in the Plain of Murthemne
Ath Berchna: in Connacht,áinBóCú north-west of Croohan, near Bellanagare; it may be for Ath Bercha, in East Roscommon, and on or near the Shannon
Ath Buide: the village of Athboy, in the territory of Ross, County Meath
Ath Carpat: a ford on the river Nith (now the Dee), in the County Louth
Ath Ceit Chule: a ford on the river Glais, in Ulster
Ath Coltna: in Connacht, south-west of Ath Moga and south-east of Cruachan
Ath da Fert: a ford in Sliab Fuait, probably in the south of the barony of Upper Fews, County Armagh
Ath Firdead: Ardee, a ford and a small town on the river Dee, in the County Louth
Ath Gabla: a ford on the Boyne, north of Knowth, in the County Meath (pronounced _Ah gowla_)
Ath Irmidi: the older name of Ath Fene, south of Iraird Cuillinn
Ath Lethain: a ford on the Nith, in Conalle Murthemni
Ath Luain: Athlone, on the Shannon, on the borders of Connacht and Meath
Ath Meislir: a ford in Sliab Fuait, in Ulster
Ath Moga: the present Ballymoe, on the river Suck, about ten miles to the south-west of Cruachan, County Galway
Ath na Foraire: on the road between Emain and Loch Echtrann
Ath Slissen: Bellaslishen Bridge; a ford on the Owenure River, near Elphin, in Connacht
Ath Solomshet: a ford, probably in Ulster
Ath Traged: at the extremity of Tir Mor, in Murthemne
Ath Truim: Trim, on the river Boyne, in the County Meath
Aue: a slave in the household of King Conchobar
Badb: the war-fury, or goddess of war and carnage; she was wont to appear in the form of a carrion-crow. Sometimes she is the sister of the Morrigan, and, as in the Táin Bó Cúalnge, is even identified with her (pronounced _Bive_)
Badbgna: now Slieve Bawne, a mountainous range, in the barony of Ballintubber, in the east of County Roscommon
Baile: north-east of Meide ind Eoin, on Medb's march from Connacht into Ulster
Bairche: Benna Bairche, the Mourne Mountains, north of Dundalk, in Ulster
Belat Aileain: probably between Cualnge and Conalle Murthemni
Bercha: on or near the Shannon, near Bellanagare, in East Roscommon
Bernas: the pass cut by Medb from Louth into Armagh; probably the "Windy Gap" across the Carlingford Peninsula
Bir: the name of several rivers; probably Moyola Water, a river flowing into Lough Neagh