Eanna was also known as "Ceann-Salach" [unclean head], and was so called by Cednathech the Druid, whom he slew at Cruacxhan Cleanta [Croghan Hill, in the King's County]. Eanna was the elder of Labhradh's two sons. He defeated Eochaidh Muigh Meadhoin [Eocy Moyvone], the Monarch, in 365 at Croghan HIll in the King's County.