Glencloy, a glen in Kilbride parish, on the E side of the Isle of Arran, Buteshire. Commencing as Gleann Dubh at an altitude of 148 feet, it descends 4 miles north-eastward to a convergence with Glensherrig and Glenrosie, in the vicinity of Brodick, and for the first 2 miles is a deep, dark ravine, flanked by high hills, and traversed by an impetuous streamlet.—Ord. Sur., sh. 21, 1870.

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