 In 1111, Domnall mac Taidc appears to have forcefully seized the kingship of the Isles.Although it is possible that he had backing from Ua Briain himself, there is evidence to suggest that made his move without Ua Briain's consent.Not long after this undertaking, Domnall appears to have been either forced from the Isles, or drawn back to Ireland in an attempt to capitalise on Ua Briain's failing health, only to be slain himself in 1115.