Patrick III, 7th Earl of Dunbar[1] (c. 1213 – 24 August 1289) was lord of the feudal barony of Dunbar and its castle, which dominated East Lothian, and the most important military personage in the Scottish Borders.
[2] In 1263 he founded a monastery for the Carmelites or White Friars in Dunbar; and led the left division of the Scottish army at the battle of Largs the same year.
In 1266 when Magnus V of Norway ceded the Isle of Man and the Hebrides to King Alexander III of Scotland, the Earl of Dunbar's seal appears on the Treaty of Perth, signed in Norway in 1266.
In 1284 he attended the parliament at Scone which declared the Princess Margaret of Norway to be heiress to the Scottish Crown.
[2] He married firstly, before 1240, Cecily, daughter of John FitzRobert, Lord of Warkworth, Northumberland (died 1240),[2][4] He married secondly Christiana,[5][6][7] daughter of Robert de Brus, 5th Lord of Annandale, the "Competitor" (1210–1295),[8] and had five known children: Although some sources show Christiana de Brus as Patrick's wife and the mother of his children, other sources are in disagreement with this.