Wikipedia:Today's featured article/April 19, 2017

Donnchadh (Duncan), Earl of Carrick (died 1250), was a Gall-Gaidhil prince and one of the longest serving magnates in medieval Scotland. His father, Gille-Brighde of Galloway, and his uncle, Uhtred of Galloway, were the two rival sons of Fergus, Lord of Galloway. As a result of Gille-Brighde's conflict with Uhtred and the Scottish monarch William the Lion, Donnchadh became a hostage of King Henry II of England. He probably remained in England for almost a decade before returning north on the death of his father. Although denied succession over all the lands of Galloway, he was granted lordship over Carrick in the north. Allied to John de Courcy, Donnchadh fought battles in Ireland, acquiring and losing land there. A patron of religious houses, particularly Melrose Abbey and North Berwick priory nunnery, he attempted to establish a monastery in his own territory, at Crossraguel. He married the daughter of Alan fitz Walter, a leading member of the family later known as the House of Stewart—future monarchs of Scotland and England. His descendants include the Bruce, the Stewart Kings of Scotland, and probably the Campbell Dukes of Argyll.