Ox of Dil
A huge cow or bull, the offspring of the Beast of Lettir Dallan when it mated with one of the cattle on the shore of the lake. One of the mounds beside the Boyne was named Bri Dam Dile, "the Hill of the Ox of Dil."
- Meyer, K. (ed.). (1906). The Triads of Ireland. Royal Irish Academy. Todd Lecture Series 13. Dublin: Hodges, Figgis, & Co., p. 31