Philip Mowbray John Barbour's "The Brus": He subsequently was made Governor of Stirling Castle which was held by English forces. It came under prolonged siege from Edward Bruce, the King's younger brother, and in 1314 they made a deal that the castle would return to Scottish control unless received by English forces before 24 June. When the English army arrived Mowbray advised Edward II of England against taking Bruce on, but Edward insisted leading to the Battle of Bannockburn. Mowbray subsequently changed to supporting Bruce, and was killed alongside Edward Bruce at the Battle of Faughart in 1318. His brother was Roger
Christina Bruce Moreover, there is no evidence of any familial relationship with Gartnait's son and successor, Donald II. Gartnait was instead likely married to an elder sister of Christina's. In 1335, during the Second War of Scottish Independence, Christina commanded the garrison of Kildrummy Castle and successfully held out against pro-Balliol forces led by David of Strathbogie, prior to their defeat by her husband, Sir Andrew Murray, at the Battle of Culblean. Christina Bruce Christina Bruce (c. 1278 – 1356/1357), also known as Christina de Brus, was a daughter of Marjorie, Countess of Carrick, and her husband, Robert de Brus, "jure uxoris"