Betty Washington was born 20 June 1733 to Augustine Washington (c1694-1743) and Mary Ball (1708-1789) and died 31 March 1797 of unspecified causes. She married Fielding Lewis (1725-1782) 7 May 1750 . Charlemagne (747-814)/s, Hugh Capet (c940-996)/s.
Betty Washington was Gen. Washington's sister. She married Col. Fielding Lewis, a second-cousin via her great-grandfather Augustine Warner II. They had several children.