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, Fíachu 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.
[citation needed] He ruled for either twenty-one[1] or twelve years,[2][3] until he was killed by his cousin Ailill, son of Slánoll.
The Lebor Gabála Érenn synchronises his reign with that of Deioces of the Medes (694–665 BC).