Alternatively, Uí Máil may have derived their name from the Glen of Imaal, in the west of modern County Wicklow, which lay in the centre of their historic lands.
Cellach succeeded his cousin as king of Uí Máil when Fiannamail was murdered by a servant named Fochsechán, probably on the orders of Fínsnechta Fledach.
[1] The kingship of Leinster passed to the Uí Dúnlainge in the person of Bran Mut mac Conaill who died in 693, to be followed as king by Cellach.
[3] In 707 the Uí Néill High King of Ireland Congal Cennmagair campaigned in Leinster and obtained Cellach's submission to his authority.
Of Cellach's surviving sons, Áed was killed in 719 near Fennor, County Kildare, Crimthann died in battle, "at an immature age" according to the Annals of Ulster in 726, and Eterscél in 727 fighting against Fáelán mac Murchado.