Complex sentence: Her paternal grandparents were Sir Thomas Stanhope and Mary Jerningham, and her maternal grandparents were Fulke Bourchier, 2nd Baron Fitzwaryn and Elizabeth Dynham.
Split into simpler sentences: Her paternal grandparents were Sir Thomas Stanhope and Mary Jerningham. Her maternal grandparents were Fulke Bourchier, 2nd Baron Fitzwaryn and Elizabeth Dynham.