Justin, I have a number of McDuffies in my tree and (in case you haven’t come across it already) there is a 1841 census record for your Donald in Cornabus, with his mother and four older sisters, Mari

I am Iain Brown, now living in Dunfermline, Fife. My connection to Islay is through my paternal grandmother, Catherine McDougall Gray, who lived on Main Street in Bowmore until she passed away in 1977