Duncan (MacDuff?), Earl of Fife, son and heir (of Duncan), Justiciar of Scotland; one of the nobles who, in 1174, agreed to the convention at Falaise with Henry II, King of England. He m. at Edinburgh, in 1159-60, Ada, or Ela, said to be niece of Malcolm IV. He d. 1203, after July. (Complete Peerage V:373)