Dukes in the United Kingdom
Duke, in the United Kingdom, is the highest-ranking hereditary title in all four peerages of the British Isles. A duke thus outranks all other holders of titles of nobility (marquess, earl, viscount and baron).
Baron Willoughby of Parham
Baron Willoughby of Parham was a title in the Peerage of England with two creations. The first creation was for Sir William Willoughby who was raised to the peerage under letters patent in 1547, with the remainder to his heirs male of body. The second creation was by writ in 1679, without the restriction on inheritance by gender. The creation of the barony gave right to an hereditary peerage and seat in the House of Lords, the upper house of Parliament.