Berngal, son of Géde Ollgothach, was, according to medieval Irish legend and historical tradition, a High King of Ireland. He took power after killing his predecessor and cousin and his father's killer, FÃÂachu Findoilches. He made so much war that there was a shortage of milk and corn - according to one version, only a sack and a half. He ruled for either twenty-one or twelve years, until he was killed by his cousin Ailill, son of Slánoll. The Lebor Gabála ÃÂrenn synchronises his reign with that of Deioces of the Medes (694âÂÂ665 BC). The chronology of Geoffrey Keating's Foras Feasa ar ÃÂirinn dates his reign to 833âÂÂ831 BC, that of the Annals of the Four Masters to 1209âÂÂ1197 BC.