Dunlaith married Niall Frossach MAC FERGAIL rí Ailech, Ard-rí na h'Éireann, son of Fergal MAC MÁEL DÚIN rí Ailech, Ard-rí na h'Éireann and Unknown. (Niall Frossach MAC FERGAIL rí Ailech, Ard-rí na h'Éireann was born in 718 and died in 778 in Iona, Argyll, Scotland.)