Obornius, Thomas Osborne, earl of Danby, marquess of Camathen and 1st Duke of Leeds (February 20, 1631 - July 26, 1712), English statesman. Treasurer of the Navy 16681673, Lord High Treasurer 16731679, Lord President of the Council 16891699, Custos Rotulorum of the East Riding of Yorkshire 16891699, Justice in Eyre north of the Trent, 17111712.