June, I am not a descendant of Issac or Joseph McKnitt Alexander, but I know that Issac's father was David Alexander. My g.g.g. grandfather, Daniel Alexander, married Issac's sister Sarah (Sallie) on Aug. 14, 1800 in Charlotte N.C. They went to Tennessee. Daniel visited Issac and his family in Alabama in 1829. I know of Issac's other brothers and sisters if you do not have this information.