Complex sentence: The Cockeram family descended from George Cockeram (d.1577) of "Hunington" in Devon, whose younger grandson Robert Cockeram (1554-1632) was a Fellow of Oriel College, Oxford, and whose monument survives in Cullompton Church.
Split into simpler sentences: The Cockeram family descended from George Cockeram (d.1577) of "Hunington" in Devon. He was a Fellow of Oriel College, Oxford, and his monument survives in Cullompton Church.