Clementina Drummond-Burrell was the only surviving child of James Drummond, 11th Earl of Perth. She married Peter Robert Burrell, a great dandy of the day, in 1807. On his marriage, at his father-in-law’s insistence, he joined his wife’s family name to his. His father had been created Lord Gwydyr, and in 1820 he succeeded to that title; his mother was Lady Willoughby de Eresby in her own right, and in 1828 he also succeeded to this title, and Clementina became Lady Willoughby de Eresby. One of the young patroness of Almack’s, she was considered, along with Lady Castlereagh, to be the highest stickler and overly grand.
The portrait of a turbaned lady most often identified as Mrs. Drummond-Burrell is actually that of her mother-in-law: Priscilla, Lady Willoughby de Eresby. I can find no authenticated portrait of Mrs. Drummond-Burrell.
Mrs. Drummond Burrell attends one of Grace’s “at home” afternoons in Candice’s book Lady Be Bad.