He succeeded his grandfather Eochaid Ollathair ("the Dagda") as High King of Ireland.
Delbáeth ruled the united Tuatha Dé Danann and Fomorians for ten years, before dying at the hand of his son, Fiacha.
Portions of Lebor Gabála Érenn identify Delbáeth as the father of Brian, Iuchar, and Iucharba, and also mention that Delbáeth was also called "Tuirill Biccreo".
Delbáeth seems to be the same character as the thunder god Tuireann,[citation needed] because he was identified as "Tuirill Biccreo", the father of Brian, Iuchar, and Iucharba, mentioned above.
This article relating to a Celtic myth or legend is a stub.