Although her mother was the wife of Roger Palmer, 1st Earl of Castlemaine, she was most probably the daughter of Charles II. One of her mother's other lovers the second Earl of Chesterfield has also been considered as a possible father.
Although her mother was the wife of Roger Palmer, 1st Earl of Castlemaine, she was also a mistress of Charles II, who was probably her real father. Another of her mother's lovers, the 2nd Earl of Chesterfield has also been considered as a possible father.