Complex sentence: William Coningsby was born the son of Sir Humphrey Coningsby of Aldenham, Hertfordshire and was educated at Eton and King's College, Cambridge, becoming a Fellow of that college.
Split into simpler sentences: William Coningsby was born the son of Sir Humphrey Coningsby of Aldenham, Hertfordshire. He was educated at Eton, and King's College, Cambridge, becoming a Fellow of that college.