Holders

• 1 Henry Bentinck, 1st Duke of Portland * 1682
• 2 William Bentinck, 2nd duke of Portland * 1708
• 3 William Henry Cavendish-Bentinck, 3rd duke of Portland * 1738
• 4 William Henry Cavendish-Scott-Bentinck, 4th duke of Portland * 1768
• 5 William John Cavendish-Scott-Bentinck, 5th duke of Portland * 1800
• 6 William John Arthur Cavendish-Bentinck, 6th duke of Portland * 1857
• 7 William Arthur Henry Cavendish-Bentinck, 7th duke of Portland * 1893
• 8 Ferdinand William Cavendish-Bentinck, 8th duke of Portland * 1888
• 9 Victor Frederick William Cavendish-Bentinck, 9th duke of Portland * 1897

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