The Uí Dúnchada dynasty held an important ecclesiastical role within the triumvirate, the Abbacy of Kildare, and Muiredach was simultaneously abbot and Kings of Leinster. The Uí Néill clientship dates to 806 when High King Aed Oirdnide mac Néill invaded Leinster and deposed Finsnechtae. Finsnechtae regained the kingdom, presumably with Uí Néill support until his death in 808 causing dynastic strife and a further invasion of the High King.
The Uí Dúnchada dynasty held an influential position within the religious and political landscape of Leinster, serving as both abbot and king during a period marked by conflict and power struggles. The Uí Néill client relationship played a significant role in this dynamic.