 Domhnall Óg, a cousin of Ruaidhrí, was proclaimed lord by the chiefs of Cenél Conaill at Kilmacrenan, but Ruaidhrí's son, Toirdhealbhach, defied Domhnall Óg.When Domhnall Óg died in 1529 Toirdhealbhach had himself inaugurated at Kilmacrenan.This angered Aodh Dubh Ó Domhnaill, because he believed, only he alone had the right to inaugurate a sub chief of his.