Have you ever heard of Domini Douglass who was born on 2 May1732 in Belfast, Ireland? He married Mary Warner in New Milford, Litchfield,CT on 5 May 1761 and he died on 4 Apr 1807 in Shoreham, Addison, VT.
His son Joseph is a new DAR "patriot" and I'm not clear whether he's made it onto their roster or not.
Just thought I'd ask. Your names don't sound familiar, and settling in PA isn't consistent with my migration record, but it never hurts to add to one's files!
Good luck,
Mary