Complex sentence: The eldest son, Sir John Smythe of Bidborough, married Isabella Rich, daughter of Robert Rich, 1st Earl of Warwick and Penelope Devereux and had issue, including Letitia Isabella Smythe (d.1714), who married John Robartes, 1st Earl of Radnor.
Split into simpler sentences: The eldest son, Sir John Smythe of Bidborough, married Isabella Rich, daughter of Robert Rich, 1st Earl of Warwick and Penelope Devereux. Their children included Letitia Isabella Smythe (d.1714), who married John Robartes, 1st Earl of Radnor.