Introduction Karim Aga Khan’s mother is popularly known within Ismaili circles as Princess Tajuddawlah and in the Western media as Joan Aly Khan. At age 19, Princess Tajuddawalah married Group. Captain Thomas L.E.B. Guinness. Prince Tajuddawlah was then known as Joan Barbara Yarde-Buller. After obtaining a divorce from Thomas Guinness, she married Prince Aly S.…