Aengus, son of Nadfraoch, King of Munster, was slain in the battle of Cell Osnata, in the plain of Magh Fea, now Kellistown, in the barony of Forth and county of Carlow, in the year 439.
| From The Genealogies, Tribes, and Customs of Hy-Fiachrach, commonly called O'Dowda's Country (Author: Duald Mac Firbis), p.5 | Corpus of Electronic Texts Edition Close footnote |