Question: Who is Priscilla Bertie, 21St Baroness Willoughby De Eresby's maternal grandfather?
Sentence (from "Priscilla Bertie, 21st Baroness Willoughby de Eresby"): On 23 February 1779, she married Sir Peter Burrell (later 1st Baron Gwydyr) and they later had two children.
Relevant evidence: No