Complex sentence: Charles Cawley, Medieval Lands, Earls of Essex 1199-1227 (Mandeville-2) Her paternal grandparents were Geoffrey Fitzpeter, 1st Earl of Essex and Aveline de Clare, and her maternal grandparents were Hugh Bigod, 3rd Earl of Norfolk and Maud Marshal.
Split into simpler sentences: Charles Cawley, Medieval Lands, Earls of Essex 1199-1227 (Mandeville-2) Her paternal grandparents were Geoffrey Fitzpeter, 1st Earl of Essex and Aveline de Clare. Her maternal grandparents were Hugh Bigod, 3rd Earl of Norfolk and Maud Marshal.