Eleanor of Aquitaine was the consort of Henry and the mother of two Plantagenet kings, Richard I and John.
The Fifth Doctor once claimed that Eleanor had told John stories in his youth about an ancestor of King Henry, an early Count of Anjou, who had been married to Melusine, Satan's daughter. (PROSE: The King's Demons)
She was among the notable women of Earth's history who were invited by Missy to join MADAM. In her invitation, Missy commended her for how she dealt with the Fair Rosamund, which involved the "cup of poison/dagger thing". She left MADAM along with all of its other members after the Twelfth Doctor, undercover as Circe, antagonised Missy into saying something sexist. (PROSE: Girl Power!)
Eleanor had died by 1215. (PROSE: The King's Demons)