Marjorie Bruce was named after her father's mother, Marjorie, Countess of Carrick. According to legend, Marjorie's parents had been very much in love, and Robert the Bruce did not remarry until 1302 (six years after his first wife’s death), to a courtier named Elizabeth de Burgh. On 27 March 1306, her father was crowned King of Scots at Scone, Perthshire, and Marjorie, then 10 years old, became a Princess of Scotland. Three months after the coronation, in June, 1306, her father was defeated at the Battle of Methven. He sent his wife, two sisters, and Marjorie north with his supporter Isabella MacDuff,
Christopher Seton letter of excommunication was issued naming the Earl of Carrick and three other knights, Sir Alexander Lindsay, Sir Christopher and his brother John Seton as John Comyn's murderers. Seton was also present at the coronation of his brother in-law King Robert I, King of Scots, at Scone on 25–26 March 1306. Some accounts have him present at the Battle of Methven on 19 June 1306 but Duncan places him at Loch Doon Castle, an important castle for the Earls of Carrick and one of three that Robert tried to hang on to, but Loch Doon fell about 14 August. Loch