Fir Assail: a district containing the barony of Farbill, in Westmeath
Flidais Foltchain: wife of Ailill Finn, a Connacht chieftain; after her husband's violent death she became the wife of Fergus, and accompanied him on the Táin
Fochain: near Cuchulain's abode
Fochard Murthemni: Faughart, two miles north-west of Dundalk, in the County Louth
Fodromma: a river flowing into the Boyne near Slane
Fuil Iairn: the name of a ford west of Ardee
Gabal: the Feeguile, a river in the King's County
nGabar: a place near Donaghmore, perhaps to, the west of Lough Neagh in the County Tyrone
Galian: a name the Leinstermen bore. They were Ailill's countrymen