[1] The title originates in Macduf contained mostly within the boundaries of the Town of Macduff, in the Banff and Buchan area of Aberdeenshire, Scotland.
[3] William Shakespeare's MacBeth has always played a role in the legend of Clan MacDuff, as few can determine the line between The Duff Family history and historical fiction.
[4] This ambiguity worked to the benefit of future MacDuff Barons, who were able to prove they were descended from the first Duff to receive a charter in Northeast Scotland.
[5] In 1404 David Duff received the charter, in Aberdeenshire, from Robert III of Scotland.
[6] William Duff had five sons - the eldest, James, would become the 2nd Earl Fife and the 1st Baron of MacDuff.