Duke of Rothesay King of Scots, first held the dukedom from its creation in 1398. After his death, his brother James, later King James I, received the dukedom. Thereafter, the heir-apparent to the Scottish Crown held the dukedom; an Act of the Scottish Parliament passed in 1469 confirmed this pattern of succession. The Earldom of Carrick existed as early as the twelfth century. In 1306, Robert the Bruce, Earl of Carrick, became King Robert I of Scotland, with the earldom merging in the Crown. In the following years, successive Kings of Scots created several heirs-apparent Earl of Carrick. The Act of 1469 finally
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