Margaret Bentinck, Duchess of Portland
Margaret Cavendish Bentinck, Duchess of Portland( 11 February 1715 – 17 July 1785) was a British aristocrat, styled Lady Margaret Harley before 1734, Duchess of Portland from 1734 to her husband's death in 1761, and Dowager Duchess of Portland from 1761 until her own death in 1785.
The duchess was the richest woman in Great Britain of her time and had the largest natural history collection in the country, complete with its own curator, the parson- naturalist John Lightfoot, and the Swedish botanist Daniel Solander.
Her collection included costly art objects including the Portland Vase.
Her ambition for her collection was for it to contain and to describe every living species.
She was a member of the Bluestockings, a group of social intellectuals led by women.
She was also fourth great grandmother of Queen Elizabeth II through her mother's side.
Louisa Montagu Douglas Scott, Duchess of Buccleuch
Louisa Jane Montagu Douglas Scott, Duchess of Buccleuch and Queensberry( 26 August 1836 – 16 March 1912) was the daughter of James Hamilton, 1st Duke of Abercorn.
In 1884, she became the Duchess of Buccleuch and Duchess of Queensberry, the wife of William Henry Walter Montagu Douglas Scott, 6th Duke of Buccleuch& 8th Duke of Queensberry.
She was the paternal grandmother of Princess Alice, Duchess of Gloucester and of Marian Louisa, Lady Elmhirst, as well as the maternal great- grandmother of Prince William of Gloucester, Prince Richard, Duke of Gloucester and great- great- grandmother of Sarah, Duchess of York.
Margaret Holles, Duchess of Newcastle-upon-Tyne
Margaret Holles, Duchess of Newcastle-upon-Tyne ("née" Cavendish, 22 October 1661 – 24 December 1715/16, London) was an English noblewoman.
She was the third daughter and fourth of six children of Henry Cavendish, 2nd Duke of Newcastle-upon-Tyne and his wife, Frances Pierrepoint.
On 1 March 1690, she married John Holles, Earl of Clare.
Her husband was created Duke of Newcastle in 1694, the first creation having become extinct in 1691 when her father died without a male heir (her only brother, Henry Cavendish, Earl of Ogle, died in 1680).
They had one child, Lady Henrietta Cavendish Holles (1694–1755), who married 2nd Earl of Oxford and Mortimer and was mother to Margaret Bentinck, Duchess of Portland.
She died in 1715/16 and was buried at Bolsover Castle.
Winifred Cavendish-Bentinck, Duchess of Portland
Winifred Anna Cavendish- Bentinck, Duchess of Portland(" née" Dallas- Yorke; 7 September 1863 – 30 July 1954) was a British humanitarian and animal welfare activist.
William Cavendish-Bentinck, 3rd Duke of Portland
William Henry Cavendish Cavendish-Bentinck, 3rd Duke of Portland, (14 April 1738 – 30 October 1809) was a British Whig and Tory politician during the late Georgian era.
He served as Chancellor of the University of Oxford (1792–1809) and twice as the Prime Minister, of Great Britain (1783) and then of the United Kingdom (1807–09).
The twenty-four years between his two terms as Prime Minister is the longest gap between terms of office of any British Prime Minister.
Portland was known before 1762 by the courtesy title Marquess of Titchfield.
He held a title of every degree of British nobility: Duke, Marquess, Earl, Viscount, and Baron.
He is also a great-great-great-grandfather of Elizabeth II through her maternal grandmother.
Henrietta Bentinck, Duchess of Portland
Henrietta Bentinck, Duchess of Portland( 1774 – 24 April 1844), formerly Henrietta Scott, was the wife of William Bentinck, 4th Duke of Portland.
Henrietta was born in Edinburgh, Scotland, and was the eldest daughter and the heiress of Major- General John Scott of Fife and his second wife, the former Margaret Dundas.
Prior to her marriage, she was sometimes referred to as" the rich Miss Scott", to differentiate her from her two younger sisters.
Henrietta married the future duke in London on 4 August 1795, when he was styled Marquess of Titchfield.
The marquess obtained Royal Licence to take the name and arms of Scott in addition to that of Cavendish- Bentinck.
They had nine children:
The marquess inherited his father's dukedom in 1809, and Henrietta became Duchess of Portland.
Their family home was Welbeck Abbey, Nottinghamshire, where the duke kept racehorses and carried out extensive irrigation works.
Two of the couple's sons predeceased their parents: the Marquess of Titchfield died of a brain lesion, aged 27, and Lord George Bentinck of a heart attack.
The duchess predeceased her husband, who died at Welbeck Abbey in March 1854, aged 85.
Dorothy Bentinck, Duchess of Portland
Dorothy Bentinck, Duchess of Portland ("née" Lady Dorothy Cavendish; 27 August 1750 – 3 June 1794) was Duchess of Portland as wife of William Cavendish-Bentinck, 3rd Duke of Portland, the Prime Minister of Great Britain.
She is also a great-great-great-grandmother of Queen Elizabeth II through the queen's maternal grandmother.
John Lightfoot (biologist)
The Reverend John Lightfoot (9 December 1735 – 20 February 1788) was an English parson-naturalist, spending much of his free time as a conchologist and botanist.
He was a systematic and effective curator of the private museum of Margaret Bentinck, Duchess of Portland.
He is best known for his "Flora Scotica" which pioneered the scientific study of the plants and fungi of Scotland.
He elected a Fellow of the Royal Society for his scientific work.
Ivy Cavendish-Bentinck, Duchess of Portland
Ivy Cavendish- Bentinck, Duchess of Portland DBE( née Gordon- Lennox; 16 June 1887 – 3 March 1982) was Duchess of Portland from 1943 – 1977 and afterwards Dowager Duchess.
She initiated the Harley Foundation," to encourage creativity".
Natalia Grosvenor, Duchess of Westminster
Natalia Ayesha Grosvenor, Duchess of Westminster(" née" Phillips; born 8 May 1959) is the widow of The 6th Duke of Westminster.
The Duchess will assume the style of Her Grace Natalia, Duchess of Westminster or Her Grace
The Dowager Duchess only upon the marriage of her son.
At the time of her husband's succession to the title, there were four Duchesses of Westminster, the current Duchess, Sally Grosvenor, Duchess of Westminster, Anne Grosvenor, Duchess of Westminster and Viola Grosvenor, Duchess of Westminster.

Question: Where does Dorothy Bentinck, Duchess Of Portland's husband work at?
Answer: University of Oxford