Complex sentence: By his wife Frances Goodwin he had a sole daughter and heiress Cordelia, who married George Pendred, and had one son Morley Pendred Saunders, who inherited the family estates from his grandfather, and at his request adopted the surname Saunders.
Split into simpler sentences: By his wife Frances Goodwin he had a sole daughter and heiress Cordelia, who married George Pendred. They had one son, Morley Pendred Saunders, who inherited the family estates from his grandfather, and at his request adopted the surname Saunders.