Domhnall I, Earl of Mar

Domhnall I, Earl of Mar, also known by the name Domhnall mac Uilleim, was the seventh known mormaer of Mar in medieval Scotland, ruling from the death of his father, Uilleam of Mar, in 1276 until his own death sometime between 1297 and 1302. If Gille Críst is excluded, Domhnall I is considered the sixth mormaer or Earl of Mar.