Clan Mackenzie in the 13th and 14th centuries, terminated in the heiress Margaret del Ard, the Lady of Erchless, who married Alexander Chisolm of Cromer c.1350. In the 14th century during the Wars of Scottish Independence the Clan Mackenzie is said to have been among the clans who fought on the side of Robert the Bruce at the Battle of Inverurie (1308) against the forces of the Clan Comyn who were rivals to the throne. Chief Iain Mac Coinnich is said to have led a force of five hundred Mackenzies at the Battle of Bannockburn in 1314 where the English were defeated.
Robert the Bruce years. A team of researchers, headed by Professor Andrew Nelson from University of Western Ontario have determined that Robert the Bruce did not have leprosy. They examined the original casting of the skull belonging to Robert the Bruce's descendant Lord Andrew Douglas Alexander Thomas Bruce, and a foot bone that had not been re-interred. They determined that skull and foot bone showed no signs of leprosy, such as an eroded nasal spine and a pencilling of the foot bone. The king's body was embalmed, and his sternum sawn open to allow extraction of the heart, which Sir James Douglas placed