 There are no certain contemporary notices of Domhnall , and Domhnall 's existence is not explicitly attested in any reliable contemporary source datable to any particular year . However , in 1212 , Domhnall may have been one of the " sons of Raghnall " who suffered some kind of military defeat at the hands of the men of the Isle of Skye . The Annals of Ulster , reporting for the year 1209 , recorded that : 
