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).
Peerage of Scotland
In the following table of the Peerage of Scotland as it currently stands, each peer's highest ranking title in the other peerages (if any) are also listed. Those peers who are known by a higher title in one of the other peerages are listed in "italics".