My grandfather's mother was a Gartly, and I was told they at one point had a castle in Aberdeenshire, Scotland. I believe through talking to people in various Scotland research pages that the surname Gartly came from the Barclay (Berkeley) Clan. I'm trying to find when a line switched from Barclay to Gartly. The earliest Gartly I have in my tree is a Samuel Gartly (b. Abt 1790 PA - d. Oct 8, 1862 PA) and lived in Westmoreland County, Pa. I'm hoping that finding the surname connection may help me find Samuel's parents.