Ben Macdui is the second highest mountain in the United Kingdom after Ben Nevis, and the highest in the Cairngorms. After the defeat of Domnall mac Uilliam in 1187, Donnchad II, Earl of Fife, acquired Strathavon, a territory stretching from Ballindalloch to Ben Macdui; because the mountain marked the western boundary of Donnchad's territory, historian and place-name scholar Professor G.W.S. Barrow has suggested that the mountain took its name from Donnchad's family, the Mac Duibh.
Ben Macdui lies on the southern edge of the Cairn Gorm plateau, on the boundary between Aberdeenshire and Moray.
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