Mattawoman was the country estate of Colonel William Eilbeck, a wealthy planter and merchant, and his wife Sarah Edgar.
[1] On 4 April 1750, Colonel Eilbeck's only child, 16-year-old Ann, married George Mason at Mattawoman.
[1][2] George Mason bequeathed Mattawoman and all his lands upon Chicamuxen and Mattawoman creeks to his son William Mason.
[4] At age 23 in 1780, Mason's eldest son George Mason V inherited Mattawoman from his maternal grandmother, Sarah Eilbeck.
[5] Mason inherited his father's properties upon his death in 1792.