Glenfearnach, a verdant glen in the E of Moulin parish, Perthshire, traversed by the Allt Fearnach, which, rising at an altitude of 2250 feet, runs 10 ½ miles south-south-eastward, till, after a descent of 2000 feet, it unites at Enochdhu hamlet with the Allt Doire to form Airdle Water.—Ord. Sur., shs. 64, 55, 56, 1869-74.

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