Statistics for Dukedoms in the peerages of Britain and Ireland

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Year of creation	Full title	% Correct
1986	Duke of York	93%
2011	Duke of Cambridge	89%
1947	Duke of Edinburgh	81%
1337	Duke of Cornwall	78%
1934	Duke of Kent	78%
1438	Duke of Norfolk	68%
1928	Duke of Gloucester	67%
1694	Duke of Devonshire	48%
1766	Duke of Northumberland	48%
1874	Duke of Westminster	45%
1814	Duke of Wellington	44%
1702	Duke of Marlborough	40%
1547	Duke of Somerset	40%
1701	Duke of Argyll	39%
1719	Duke of Manchester	35%
1398	Duke of Rothesay	31%
1900	Duke of Fife	29%
1657	Duke of Richmond, Lennox and Gordon	28%
1694	Duke of Bedford	27%
1703	Duke of Rutland	25%
1684	Duke of St. Albans	25%
1643	Duke of Hamilton and Brandon	23%
1766	Duke of Leinster	23%
1833	Duke of Sutherland	23%
1663	Duke of Buccleuch and Queensbury	22%
1703	Duke of Atholl	20%
1868	Duke of Abercorn	19%
1682	Duke of Beaufort	18%
1675	Duke of Grafton	16%
1707	Duke of Montrose	15%
1707	Duke of Roxburghe	13%