What is "colgrain"

Colgrain is a village in Argyll and Bute, Scotland. The name Colgrain is known from at least 1377 when Sir William Denzeltoun (of Colgrane) gives his consent to a grant made by his father, Sir John Denzeltoun of that Ilk, to the church of Glasgow. The village is located to the east of Helensburgh.