First Earl of Fife. References indicate a son of Ethelred was named Duffagan, who was MacDuff. Duffagan was witness to a charter at Scone in the year 1115.
Date of death ca.
Second Earl of Fife. Third Earl of Fife. Gillimichael MacDuff was a younger brother of Constantine who was witness to charter of Holyrood in 1123, also, a charter of Dumfermline, he died in 1139. He was succedded by his eldest son Duncan. Fourth Earl of Fife.