Coyle or Coila (popularly Kill), a stream of Kyle district, Ayrshire. It rises in the S of Ochiltree parish close to the boundary with Coylton, and winds 14½ miles north-westward to the river Ayr, at a point 3¾ miles E of the town of Ayr. It makes a cascade, 25 feet wide and 15 feet in fall, under the ridge on which stands Sundrum House; its yellow trout are good, but not over plentiful; and at Millmunnoch, on its bank, Burns makes the ' Poor and Honest Sodger' return to his ain dear maid.

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