I have a Matthew Overton, son of John Overton b. 1740, no death date. John was married to Mary Elizabeth Overton (Winston) d. 1806. Matthew was a younger brother of George Overton b. c. 1755. Matthew had 9 other siblings, but I have no dates of birth or death of them, no places of birth or death and no spouses. My point is, I cannot guarantee the accuracy of this info but hope it might shed some light on your research.
Charles Patterson