NPG Ax143915; Ivy Cavendish-Bentinck (née Gordon-Lennox), Duchess of Portland - Portrait - National Portrait Gallery
Nottinghamshire history > The Portland Peerage Romance (1907)
William Henry Cavendish Bentinck, 3rd duke of Portland | prime minister of Great Britain | Britannica
History of William Cavendish-Bentinck Duke of Portland - GOV.UK
William Bentinck, 4th Duke of Portland - Wikipedia
Malcolm Sinclair, 20th Earl of Caithness - Wikipedia
William Bentinck, 2nd Duke of Portland - Wikipedia
NPG Ax161372; Winifred Anna Cavendish-Bentinck (née Dallas-Yorke), 6th Duchess of Portland - Portrait - National Portrait Gallery
Alan Calder Writer: Up In Caithness 2
Earl of Portland - Wikipedia
John Bentinck, 5th Duke of Portland - Wikipedia
NPG Ax143914; 7th Duchess of Portland and her daughters - Portrait - National Portrait Gallery
Nottinghamshire history > The Portland Peerage Romance (1907)
Winifred Anna Cavendish-Bentinck (Dallas-Yorke), Duchess of Portland (1863 - 1954) - Genealogy
William Henry Cavendish Bentinck, 3rd Duke of Portland (1738-1809)
Nottinghamshire history > County pedigrees (1910) > Bentinck, Duke of Portland
William Cavendish-Bentinck, 6th Duke of Portland - Wikipedia
William Henry Cavendish Bentinck, 3rd duke of Portland | prime minister of Great Britain | Britannica
Nottinghamshire history > The Portland Peerage Romance (1907)
The Duke of Portland
LANGWELL HOUSE, BERRIEDALE (RESIDENCE OF THE DUKE OF PORTLAND) - TuckDB Postcards
William Cavendish-Bentinck, 6th Duke of Portland - Wikipedia
Earl of Portland - Wikipedia
William Cavendish-Bentinck, 3rd Duke of Portland - Wikipedia
