William Henry Cavendish Cavendish-Bentinck, 3rd Duke of Portland, KG, PC, FRS (14 April 1738 – 30 October 1809) was a British Whig and then a Tory politician...

be a long co-held title, Duke of Portland, was created in 1716 and became extinct in 1990 upon the death of the ninth Duke, at which point the earldom...

William Henry Cavendish-Scott-Bentinck, 4th Duke of Portland, PC (24 June 1768 – 27 March 1854), styled Marquess of Titchfield until 1809, was a British politician...

Cavendish-Scott-Bentinck, 5th Duke of Portland (17 September 1800 – 6 December 1879), styled Lord John Bentinck before 1824 and Marquess of Titchfield between 1824...

William Bentinck, 2nd Duke of Portland KG (1 March 1709 – 1 May 1762), styled Viscount Woodstock from 1709 to 1716 and Marquess of Titchfield from 1716...

William John Arthur Charles James Cavendish-Bentinck, 6th Duke of Portland, KG, GCVO, GCStJ, TD, PC, DL (28 December 1857 – 26 April 1943), known as William...

William Arthur Henry Cavendish-Bentinck, 7th Duke of Portland, KG (16 March 1893 – 21 March 1977), styled Marquess of Titchfield until 1943, was a British peer...

Buckinghamshire. Portland's eldest son Henry succeeded him as earl, and was granted the titles of Marquess of Titchfield and Duke of Portland in 1716. While...

life, and the museum provides some income for his family. The 5th Duke of Portland is known to have been a hobby tunneler, although he did no digging...

Several vessels have been named Duke of Portland for one or another Earl of Portland: Duke of Portland (1794 ship) was a sailing ship built in 1790 at...