The Duncans come from the same stock as the Clan Robertson who, called Clan Donnachaidh, are descended from "fat Duncan" or Donnachaidh Reamhar, who lived in the 13th century. This ancestor led his men in support of Robert the Bruce at the Battle of Bannockburn in 1314. The Duncans possessed lands in Fifeshire including Gourdie and Lundie. Sir William Dunbar, who was physician to King George III, was created a Baronet in 1764. Alexander Duncan of Lundie, Provost of Dundee, supported the Jacobites in 1745. His son, Adam, became famous as an Admiral. He defeated the Spanish at Cape St Vincent in 1780, and his most notable victory was gained at Camperdown in 1797. In 1831 he was created Earl of Camperdown.
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