sentences:  In 1389, Margaret of Angus relinquished her title in favour of her son, but George did not assume it until his betrothal in 1397 to Princess Mary Stewart, daughter of King Robert III of Scotland.The influence of George's mother must have been considerable - in addition to obtaining a royal bride for George, she persuaded King Robert III to confirm him in his style of Earl of Angus, and also to bestow upon him the lordships of Abernethy, (Perthshire) and Bonkill, (Berwickshire); and "to endow him and his spouse with the justiciary fees of the County of Forfar, to ratify all gifts, entails, and leases made or to be made by his half-sister, Isabel, Countess of Mar, to the said "Jorge" her brothir".James 2nd Earl of Douglas, was killed without issue in 1388, at the Battle of Otterburn, and the Earldom of Mar, and all non-entailed Douglas possessions passed to his sister Isabel.