Said to be aged forty-six at the time of his father's death, this Patrick was the eldest son of Patrick I, Earl of Dunbar and Ada, daughter of King William I of Scotland. He probably succeeded to his father's lands some time before the latter's death on 31 December 1232, as his father was elderly and had been ill for some time.
He renounced his claim to some disputed Marches in lower Lauderdale to the monks of Melrose, and in 1235 he, with Adam, Abbot of Melrose, and Gilbert, Bishop of Galloway, led an expedition against an uprising in Galloway. He accompanied King Alexander II of Scotland to York and was a witness and guarantor to the treaty with King Henry III of England, in 1237.
Shortly after 1242 the Earl of Dunbar was sent to subdue the rebellious Thane of Argyll. The Earl held first rank among the twenty-four barons who guaranteed the Treaty of Peace with England in 1244.
Before 1213, he married Euphemia (d. 1267 at Whittingehame), whom historians had previously believed to be daughter of Walter FitzAlan, 3rd High Steward of Scotland and lord of Kyle (i.e. Kyle Stewart), Strathgryfe and Bute.
Euphemia's father was, however, certainly not Walter FitzAlan.
Issue by Euphemia:
- Patrick, 7th Earl of Dunbar.
- Isabel de Dunbar, who married Roger FitzJohn, of Warkworth, Northumberland son of John FitzRobert (died before 22 June 1249 in Normandy).
- Fiona Watson, "Dunbar, Patrick, eighth earl of Dunbar or of March, and earl of Moray (1285–1369)", Oxford Dictionary of National Biography, Oxford University Press, Sept 2004; online edn, October 2005 accessed 29 July 2007, under Patrick Dunbar, fifth earl of Dunbar (c. 1186 – June 1249).
- Miller, James, The History of Dunbar, Dunbar, 1830, p.18, which states that "Euphemia, who was daughter of Walter High Steward of Scotland, brought to her marriage the lands of Birkenside in Lauderdale"
- Burke, Sir Bernard, Ulster King of Arms, Burke's Dormant, Abeyant, Forfeited, and Extinct Peerages, London, 1883: 606
- Seven Scottish Countesses: A Miscellany - III. Cristina de Brus, Countess of Dunbar, Vol. 17, no.2, pages 223-233.
- Weis, Fredk., Lewis, Th.D., et al., The Magna Charta Sureties 1215, 5th edition, Baltimore, 1999: 63
- Richardson, Douglas, Magna Carta Ancestry, Baltimore, 2005: 210
- Anderson, Alan O., M.A., Scottish Annals from English Chroniclers AD500 to 1286, London, 1908, p. 360.
- Dunbar, Sr Archibald H., Bt., Scottish Kings, a Revised Chronology of Scottish History, 1005 - 1625, Edinburgh, 1899, p. 282.
- McDonald, Andrew, 'Patrick, fourth earl of Dunbar (d. 1232)’, Oxford Dictionary of National Biography, Oxford University Press, 2004 accessed 28 November 2006
- Young, Alan, Robert the Bruce's Rivals: The Comyns, 1212-1314, East Linton, 1997. *
*Where he is wrongly styled "Patrick I"
- Seven Scottish Countesses: A Miscellany - III. Cristina de Brus, Countess of Dunbar, Vol. 17, no.2, pages 223-233
| Earl of Dunbar (Lothian)