Question: Who is the maternal grandfather of Robert Bertie, 4Th Duke Of Ancaster And Kesteven?
Sentence (from "Mary Bertie, Duchess of Ancaster and Kesteven"): She was the daughter of Thomas Panton of Newmarket (1697-1782), who was an equerry to King George II and master of the Thurlow Hunt, and his wife Priscilla (though she may have been illegitimate).
Relevant evidence: Yes