Dear Darren, The Leonard that was the son of Anderson and the brother of John Claybrook is Leonard Lemuel Brightwell. He was born in 1799 and was still alive in 1850 in Gibson county, living close to Mary and her siblings. My husband's 3x grandfather was also a Leonard, but he died in 1839 in Meigs county, Tenn.and he was born between 1790 and 1800. I have a hunch that his father might have been one of Anderson's brothers but can't prove it yet. Do you know anything about a son of Anderson's named James? Imogean.