Margaret Campbell, Duchess of Argyll
Ethel Margaret Campbell, Duchess of Argyll(" née" Whigham; 1 December 1912 – 25 July 1993) was a British socialite, best remembered for a celebrated divorce case in 1963 from her second husband, the 11th Duke of Argyll, which featured salacious photographs and scandalous stories.
Iona Campbell, Duchess of Argyll
Iona Mary Campbell, Duchess of Argyll( née Colquhoun; born 22 June 1945) is a Scottish noblewoman.
She was married to the 12th Duke of Argyll from 1964 until his death in 2001.
Elizabeth Hamilton, 1st Baroness Hamilton of Hameldon
Elizabeth Hamilton Campbell, Duchess of Argyll& 1st Baroness Hamilton of Hameldon(" née" Gunning; c. December 1733 – 20 December 1790) was a celebrated Irish belle, lady- in- waiting and society hostess.
Mathilda Campbell, Duchess of Argyll
Mathilda Campbell, Duchess of Argyll( née Mathilda Coster Mortimer; 20 August 1925 — 5 June 1997) was a Scottish noblewoman.
She was the third and final wife of Ian Campbell, 11th Duke of Argyll.
Peter Schermerhorn
Peter Schermerhorn( October 1, 1749 – January 28, 1826) was a wealthy New York City merchant and land owner.
He was the father of Abraham Schermerhorn and the grandfather of Caroline Schermerhorn Astor.
Caroline Campbell, Duchess of Argyll
Caroline Campbell, Duchess of Argyll (16 December 1774 – 16 June 1835),
formerly Lady Caroline Elizabeth Villiers and Caroline Paget, Lady Paget, was the wife of Henry Paget, future Marquess of Anglesey, until their divorce in 1810, and subsequently the wife of George Campbell, 6th Duke of Argyll, a friend of her first husband.
The daughter of George Villiers, 4th Earl of Jersey, and his wife Frances, Caroline was married, on 5 July 1795, in London, to Lord Paget, who at that time was MP for Carnarvon.
He was the son of the Earl of Uxbridge.
Her mother was one of the mistresses of King George IV.
They had eight children:
A portrait of Caroline with her son Henry, by John Hoppner, is held at her former marital home of Plas Newydd, now in the care of the National Trust.
In 1810, prior to Paget's elevation to the peerage, the couple were divorced as a result of his affair with Lady Charlotte Wellesley, whose husband, Henry Wellesley, 1st Baron Cowley, was the brother of the Duke of Wellington.
Charlotte's brother Henry Cadogan challenged Paget to a duel, but neither was hurt.
Caroline then sued her husband for divorce in the Scottish courts.
A divorce was granted in November 1810.
Her second marriage, to the Duke of Argyll, took place at Canongate, Edinburgh, only three weeks later.
It was the duke's only marriage, and there were no children.
The duchess is supposed to have told Paget's brother that she had never previously known "the superlative degree of bliss which she was now enjoying".
The duchess died in Dumbarton, Scotland, aged 60, and was buried at Kensal Green Cemetery, London.
Elizabeth Campbell, Duchess of Argyll
Elizabeth Georgiana Campbell, Duchess of Argyll(" née" Leveson- Gower; 30 May 1824 – 25 May 1878) was a British noblewoman and abolitionist.
Born into the wealthy Sutherland- Leveson- Gower family, she was the eldest daughter of the 2nd Duke of Sutherland by his wife, the political hostess Lady Harriet Howard.
In 1844 Elizabeth married George Campbell, Marquess of Lorne, eldest son and heir to the 7th Duke of Argyll.
She became the Duchess of Argyll in 1847 when her husband succeeded his father.
Like her mother, the Duchess of Argyll was a prominent opponent of slavery.
The pair helped write a letter titled" An Affectionate and Christian Address of Many Thousands of Women of Great Britain and Ireland to Their Sisters, the Women of the United States of America", calling for an end of slavery; it attracted signatures from 562,848 British women.
The two often hosted the American abolitionist and author Harriet Beecher Stowe when she visited England.
The Duchess and Beecher Stowe were friends and maintained a correspondence.
In 1868, the Duchess of Argyll succeeded the Duchess of Wellington as Mistress of the Robes to Queen Victoria, holding the position until 1870, when she resigned due to ill health.
Soon after being appointed a member of the newly created Order of the Crown of India, she died in 1878 whilst eating with William Ewart Gladstone in London.
George Villiers, 4th Earl of Jersey
George Bussy Villiers, 4th Earl of Jersey, PC (9 June 173522 August 1805, Tunbridge Wells) was an English nobleman, peer, politician and courtier at the court of George III.
He was the oldest surviving son of William Villiers, 3rd Earl of Jersey, and his wife, the former Lady Anne Egerton, the daughter of Scroop Egerton, 1st Duke of Bridgewater, and widow of Wriothesley Russell, 3rd Duke of Bedford.
Eleanor Campbell, Duchess of Argyll
Eleanor Mary Campbell, Duchess of Argyll( née Cadbury; 26 January 1973) is a British noblewoman.
A member of the Cadbury family, she is the wife of Torquhil Campbell, 13th Duke of Argyll.
Louise Campbell, Duchess of Argyll
Louise Campbell, Duchess of Argyll( November 27, 1904 – February 10, 1970), formerly Louise Campbell Vanneck, née Louise Hollingsworth Morris Clews, later Mrs Timpson, was the second wife of Ian Douglas Campbell, 11th Duke of Argyll and the mother of the 12th Duke.

Question: Who is the paternal grandfather of Caroline Campbell, Duchess Of Argyll?
Answer: William Villiers, 3rd Earl of Jersey