Mary Willing Byrd (1740-1814) was a planter and estate manager and social hostess and the spouse of William Byrd III. William Byrd III was a planter and estate manager and military officer whose career or family position supplies an important part of this entry’s Revolutionary context. The marriage connected Mary Willing Byrd to the political, military, commercial, or social developments surrounding the Revolution. This life overlapped the Revolutionary era, when war, political upheaval, disrupted trade, military service, and changing governments placed unusual demands on households and extended families. The recorded death at Westover Plantation, Virginia provides a later geographic anchor for a life otherwise preserved chiefly through family and genealogical records. Including Mary Willing Byrd in HistoryGPS recognizes that households, marriages, property, correspondence, hospitality, and kinship networks were essential parts of the world in which Revolutionary leaders acted.