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).
List of earls in the peerages of Britain and Ireland
As can be seen from the list above, the men who are (1) Earl of Pembroke and Montgomery, (2) Earl of Suffolk and Berkshire, (3) Earl of Lindsey and Abingdon and (4) Earl of Winchilsea and Nottingham each hold two earldoms in the peerage of England. There are therefore 24 such earldoms whose holder does not hold a higher peerage.