Complex sentence: Bothwell's elder son Richard was Provost of Edinburgh during the reign of Mary, and his younger son Adam Bothwell was Bishop of Orkney, a Lord of Session, and the father of John Bothwell, Lord Holyroodhouse.
Split into simpler sentences: Bothwell's elder son Richard was Provost of Edinburgh during the reign of Mary. Boswell's younger son Adam Bothwell was Bishop of Orkney, a Lord of Session, and the father of John Bothwell, Lord Holyroodhouse.