 Domhnall was , reputedly , the son of Raghnall ( fl . 1192 ) son of Somhairle ( died 1164 ) . The 17th @-@ century History of the Macdonalds by Hugh MacDonald of Sleat claimed that Domhnall 's father Raghnall had married a daughter or sister of the early 14th @-@ century hero Thomas Randolph , Earl of Moray . Sellar suggested that this tradition may have derived from a garbled version of reality . Perhaps , Sellar argued , his mother was a daughter of William fitz Duncan . The latter was another famous Earl of Moray , but one who lived in the 12th- rather than the 14th @-@ century . 
