The Black Comyn married Alianora, as sister of John Balliol, future King of Scots. This marriage would help lay the foundation for an unseen confrontation with the House of Bruce (and others). This was due to the heritage of Alianora's mother, the Lady Devorgilla, wife of Sir John Balliol, the Lord of Galloway. She carried a line of descent from the family of William the Lion, King of Scots; specifically through the daughters of his brother, David, Earl of Huntingdon, which the Bruces also shared. Because of this link to the Crown, Devorgilla became the mother of a King of Scots, John Balliol, and the grandmother of another, Edward Balliol (who is seldom found in the regnal lists). Alianora, in turn, passed this heritage to her son, John the Red Comyn (II), who, through his father, carried a descent from Donald III (as did the Comyn Earls of Buchan). An explosive contest for the Crown was on the horizon and with it, a crushing defeat for Clan Comyn.