Duinseach ingen Duach, Queen of Tara, fl.
[1][2] Duinseach was a daughter of Dauí Tenga Uma, King of the Connachta.
Duinseach is said to have been responsible for the battle of Seaghais in 500, where her husband killed her father.
[3][2] An account of the battle is given sub anno 499 (sic 500) in the Annals of the Four Masters: The battle of Seaghais was fought by Muircheartach mac Earca against Duach Teangumha, King of Connaught.
In proof of which Ceannfaeladh said: Against the Connaughtmen these battles were gained.