Eleanor Custis Stuart was the daughter of Dr. David Stuart and Eleanor Calvert Stuart (1784-1823) of Fairfax County, VA. Eleanor Calvert Stuart was of the Calvert family of Prince George's County, MD, and was the widow of John Parke Custis, George Washington's stepson. Eleanor had four sisters, Ann, Sarah, Ariana, and Rosalie, two brothers, William and Charles, and was the step-sister of Elizabeth, Martha, Eleanor, and George Washington Parke Custis, the grandchildren of George and Martha Washington. Eleanor Custis Stuart did not marry. [Compiled from sources and references recorded on CMS]
Johnson, Robert Winder. The Ancestry of Rosalie Morris Johnson. Philadelphia, 1905:30, 41.
Torbert, Alice Coyle. Eleanor Calvert and her Circle. New York, 1950: opposite p. 1 (genealogical table)