Complex sentence: Jocelyn's son Gilbert de Angulo, the 2nd Baron, rebelled against King Richard I of England in 1195 and was attainted and his estates forfeit; but he was later pardoned by King John of England.
Split into simpler sentences: Jocelyn's son Gilbert de Angulo, the 2nd Baron, rebelled against King Richard I of England in 1195. He was attainted and his estates declared forfeit to the Crown; but he was later pardoned by King John of England.