Deugh, a stream of Carsphairn parish, N Kirkcudbrightshire, rising on the eastern slope (2000 feet) of Windy Standard, and thence curving 5 miles westward along the Ayrshire border, next 15 miles southward, east-south-eastward, and southward again through the interior, till, at the SE angle of the parish, and at a point 7 miles NNW of New Galloway, it falls into the Ken, after a descent of 1620 feet.—Ord. Sur., shs. 15, 14,8,9,1863-64.

(F.H. Groome, Ordnance Gazetteer of Scotland (1882-4); © 2004 Gazetteer for Scotland)