I have this couple in my Harkey database. I do not have their descendants or any information on Sophia. David Harkey was born in NC .He was the son of Henry Harkey born 1766 in Rowan Co. NC and Mary Melchor who died in 1826. David had siblings, Elizabeth, Henry Jr. Polly, Sarah, Susannah, Catherine b.1787, Paul, John, Mary b.1800, Tobias b. 1805, Nelsonb. 1819.Michael 1820 and Martin in 1823. I can be reached privately at email@example.com will share Harkey genealogy.