Loch Ri: Lough Ree, on the Shannon, in the County Galway
Loegaire Buadach: son to Connad Buide and husband of Fedlimid Nocruthach; one of the chief warriors of Ulster (pronounced Layeray)
Lothor: a place in Ulster
Luachair: probably Slieve Lougher, or the plain in which lay Temair Luachra, a fort somewhere near the town of Castleisland, in the County Kerry
Lug: the divine father of Cuchulain
Lugaid: father of Dubthach
Lugmud: Louth, in the County of that name
Luibnech: possibly a place now called Limerick, in the County Wexford
MacMagach: relatives of Ailill
MacRoth: Medb's chief messenger