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 to his eldest son, Robert, the future king, so as to protect the Bruce's kingship claim while their middle lord (Robert the Bruce's father) now held only English lands. While the Bruces' bid for the throne had ended in failure, the Balliols' triumph propelled the eighteen-year-old Robert the Bruce onto the political stage in his own right. Even after John's accession, Edward still continued to assert his authority over Scotland and relations between the two kings soon began to deteriorate. The Bruces sided with King Edward against King John and his Comyn allies. Robert the Bruce and his father both