Turloch teora Crich: north of Tuaim Mona
Uachtur Lua: in the land of Ross
Uarba: a place in Ulster
Uathach: one of the three women-teachers of Cuchulain and Ferdiad
Uathu: north of Ochain
Ui Echach: the barony of Iveagh, in the County Down
Umansruth: a stream in Murthemne
Usnech: father of Noisi, Annle and Ardan
Uthechar: father of Celtchar and of Menn