In 1318 Sir Duncan Campbell, son of Donald, younger brother of Sir Neil Campbell of Lochawe received a charter of the lands of Loudoun and Stevenson from King Robert I in a barony with Loudoun as its caput, for services of a knight. This was following his marriage to Susanna Crawford, heiress of Loudoun with whom also came the office of hereditary Sheriff of Ayr. Thus started the important branch of the Campbells, later Earls of Loudoun.
Father: Sir Donald Cambel , of Loudoun
Marriage 1 Susannah Crawford