Robert Bruce, Lord of Liddesdale Robert Bruce, Lord of Liddesdale Sir Robert Bruce, Lord of Liddesdale (died 11 August 1332) was an illegitimate son of King Robert the Bruce and an unknown mother. He was knighted and awarded the royal arms at the Battle of Bannockburn. His father made him Lord of Liddesdale after William II de Soules was found guilty of treason at the Black Parliament of 1320. It has been suggested that he may have been the father of Thomas Bruce, 1st Baron of Clackmannan, but there is no clear evidence for this. Faced with Edward Balliol's invasion of Scotland, he and Donnchadh
Battle of Allt Camhna they were guilty of treachery, which is much worse than a defeat. The day and place were fixed for their meeting the Caithness men, and they did not appear, but allowed those to be cut down by a host which had laid their accounts to have the combined forces of Caithness and Sutherland to contend with"". 17th-century historian Sir Robert Gordon (1580–1656), who was living at the time of the battle and who was a younger son of Alexander Gordon, 12th Earl of Sutherland, wrote an account of the battle in his book "A Genealogical History of the Earldom of