Patrick IV, Earl of March
Patrick IV, 8th Earl of Dunbar and 1st Earl of March (1242 – 10 October 1308 or 1309), sometimes called Patric[k] of Dunbar or Patric de Dunbar, and nicknamed "Black-beard", was the most important magnate in the Borders region of Scotland. He was one of the Competitors for the Crown of Scotland.
While he appears to have been the first to use the title earl of March, this has latterly been treated as essentially synonymous with earl of Dunbar (sometimes also earl of Lothian before 1606), such that he may sometimes be referred to as "Patrick, 8th Earl of March", applying the Dunbar numbering to the March name (and similarly with his descendants).