Question: Who is Priscilla Bertie, 21St Baroness Willoughby De Eresby's maternal grandfather?
Sentence (from "Priscilla Bertie, 21st Baroness Willoughby de Eresby"): Elizabeth Bertie, 21st Baroness Willoughby de Eresby (16 February 1761 – 29 December 1828) was a daughter of the 3rd Duke of Ancaster and Kesteven and Mary Panton.
Relevant evidence: Yes