Complex sentence: The son of Sir Edward Nevill, 3rd Baron Bergavenny and Elizabeth Beauchamp, Lady Bergavenny (the daughter of Richard Beauchamp, 1st Earl of Worcester and Isabel le Despenser), he succeeded to the Barony upon the death of his father.
Split into simpler sentences: The son of Sir Edward Nevill, 3rd Baron Bergavenny and Elizabeth Beauchamp, Lady Bergavenny, was the daughter of Richard Beauchamp, 1st Earl of Worcester and Isabel le Despenser. He succeeded to the Barony upon the death of his father.