The title of Baron de Ros (pronounced "Roose") is the most ancient baronial title in the Peerage of England.
The title was originally held by the de Ros family until the death of the eleventh Baron in 1508, when it was inherited by his nephew, Sir George Manners.
The barony and earldom remained united until the death of the third Earl, Edward Manners.
BARON LEXINGTON, a title borne in the English family of Sutton from 1645 to 1723.
His only son, Robert, the 2nd baron (1661-1723), supported in the House of Lords the elevation of William of Orange to the throne, and was employed by that king at court and on diplomatic business.
He also served as a soldier, but he is chiefly known as the British envoy at Vienna during the conclusion of the treaty of Ryswick, and at Madrid during the negotiations which led to the treaty of Utrecht.