Ard Macha: Armagh
Assail: a place in Meath
Assè: north of Finnabair (Fennor), on Medb's march out of Connacht into Ulster
Ath: 'a ford' (pronounced Ah)
Ath Aladh Ind: a ford in the Plain of Murthemne
Ath Berchna: in Connacht, 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 Cliath: Dublin