The Tetrarch
She was named after empress Mumtaz Mahal, wife of Mughal Empire ruler Shah Jahan of Taj Mahal fame. Bred by Lady Sykes at her Sledmere Stud in Driffield, East Riding of Yorkshire, Mumtaz Mahal was out of the mare Lady Josephine. Her sire was The Tetrarch, whom the "Thoroughbred Heritage" website also said was "probably the greatest two-year-old of all time", and that he was "possibly the greatest runner ever."