 His place in the genealogical tradition of the MacDonalds is the only reason for believing in his existence , a genealogical tradition that not all historians have accepted . Beyond his actual existence , there is little that is certain . Three entries in Irish annals may discuss him , though he is never named ; a praise poem surviving from the Early Modern period may be descended from a poem originally written for him ; a miracle in a Manx chronicle may or may not have Domhnall as its subject ; and a doubtful charter surviving from a similarly late era was allegedly issued by him . 
