The Lordship and Barony of Hailes is a Scottish feudal lordship (a feudal barony of higher degree). Hailes is traditionally believed to have been founded by an Englishman, taken prisoner in the reign of David II of Scotland, who was rewarded with the grant of lands in East Lothian for having rescued the Earl of Dunbar and March from an attacking horse. The caput baronium (or simply "caput") of the Lordship and Barony of Hailes is Hailes Castle.