Eleanor Calvert Custis Stuart, born Eleanor Calvert, was a prominent member of the wealthy Calvert family of Maryland. Upon her marriage to John Parke Custis, she became the daughter-in-law of Martha Dandridge Custis Washington and the step-daughter-in-law of George Washington. Her portrait hangs today at Mount Airy Mansion in Rosaryville State Park, Maryland.

John Parke Custis was an American planter and politician, only son of Martha Washington before her marriage to George Washington. He is now known for his progeny, especially those raised by President Washington.