Baron Henley is a title that has been created twice: first in the Peerage of Great Britain and then in the Peerage of Ireland. The first creation came in 1760 in favour of Sir Robert Henley, Lord High Chancellor of Great Britain, when he was created Lord Henley, Baron of Grainge, in the County of Southampton. In 1764 he was further honoured when he was made Earl of Northington. On the death of his son, the second Earl, both titles became extinct. Lady Elizabeth Henley, youngest daughter of the first Earl and co-heiress of the second Earl, married the diplomat Morton Eden. In 1799, the Henley title was revived when Eden was created Baron Henley, of Chardstock in the County of Dorset, in the Peerage of Ireland. Their son, the second Baron, assumed the surname of Henley in lieu of Eden and no