Clan Donnachaidh the Battle of Methven in 1306. The clan asserts that Stout Duncan's relatives and followers (not yet known as Robertsons) supported Robert the Bruce at the Battle of Bannockburn in 1314. His descendants became known (in English or Scots) as the Duncansons, or Gaelic "Clann Dhònnchaidh", "Children of Duncan". Duncan is believed to have been killed at the Battle of Neville's Cross and was succeeded by Robert, from who the Clan Robertson takes its name. Robert's brother, Patrick, was the ancestor of the Robertsons of Lude who were the principal cadet branch. In 1394 a clan battle took place between
Robert the Bruce stated Bruce did not participate and in the following month decided to lay waste Annandale and burn Ayr Castle, to prevent it being garrisoned by the English. William Wallace resigned as Guardian of Scotland after his defeat at the Battle of Falkirk. He was succeeded by Robert Bruce and John Comyn as joint Guardians, but they could not see past their personal differences. As a nephew and supporter of King John, and as someone with a serious claim to the Scottish throne, Comyn was Bruce's enemy. In 1299, William Lamberton, Bishop of St. Andrews, was appointed as a third, neutral