Question: Who did Margaret Holles, Duchess Of Newcastle-Upon-Tyne marry?

Knowledge 1: 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. [SEP] Knowledge 2: Henrietta Harley, Countess of Oxford and Countess Mortimer
Henrietta Harley, Countess of Oxford and Countess Mortimer ("née" Lady Henrietta Cavendish Holles; 11 February 1694 – 9 December 1755) was an English noblewoman, the only child and heiress of John Holles, 1st Duke of Newcastle and his wife, the former Lady Margaret Cavendish, daughter of Henry Cavendish, 2nd Duke of Newcastle-upon-Tyne.Her hand was sought in marriage even in her youth as a means of alliance with her powerful father.Suitors included the Intendant of the Court of a Count of the Holy Roman Empire in December 1703, the Elector of Hanover's son (later George I of Great Britain) in June 1706, the Duke of Somerset's son Lord Hertford in 1707–1711, Count Nassau in 1709, and finally Lord Danby (grandson of Thomas Osborne, 1st Duke of Leeds) in 1711, before her father settled on Edward Harley, 2nd Earl of Oxford and Earl Mortimer.They were married on 31 August 1713, at Wimpole Hall.She brought, through inheritance, Welbeck Abbey in Nottinghamshire and Wimpole Hall in Cambridgeshire to her husband.They had two children.Their son, Henry Cavendish Harley, Lord Harley, lived only four days.Their only child to attain maturity was Margaret (1715–1785), and so whilst Margaret inherited most of the combined Holles-Harley fortunes on her parents' deaths, the title of Earl of Oxford and Earl Mortimer passed to Edward's cousin (also Edward).Henrietta Place (previously Henrietta Street) in Marylebone in the City of Westminster in central London was named after the Countess.Nearby Harley Street was named after her husband.The general area was owned by the Harleys and developed during their lifetimes, hence other streets are named after their family, too.This includes Oxford Street, Wigmore Street and Wimpole Street.She was buried 26 December 1755 in the Duke of Newcastle's vault in Westminster Abbey.
Knowledge 1: 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. [SEP] Knowledge 2: Violet Grantham
Violet Hardisty Grantham( 15 February 1893 – 20 May 1983) was a British politician, the first woman to served as Lord Mayor of Newcastle- upon- Tyne.Born Violet Taylor, she was educated privately, and married John Grantham, who served as Lord Mayor of Newcastle in 1936/ 37.In addition to being his Lady Mayoress, Violet served on the boards of a number of local organisations, and in 1937 she was elected to Newcastle City Council in her own right, representing the Conservative Party.In 1950/ 51, she became the first woman to serve as Sheriff of Newcastle- upon- Tyne, and was elected as an alderman of Newcastle City Council in 1951.In 1952/53, she was the first woman to serve as Lord Mayor of Newcastle- upon- Tyne, and she held the post again in 1957.She again became an elected councillor in 1958, and served until the reorganisation of local government in 1974, when she retired.
Knowledge 1: Henrietta Harley, Countess of Oxford and Countess Mortimer
Henrietta Harley, Countess of Oxford and Countess Mortimer ("née" Lady Henrietta Cavendish Holles; 11 February 1694 – 9 December 1755) was an English noblewoman, the only child and heiress of John Holles, 1st Duke of Newcastle and his wife, the former Lady Margaret Cavendish, daughter of Henry Cavendish, 2nd Duke of Newcastle-upon-Tyne.Her hand was sought in marriage even in her youth as a means of alliance with her powerful father.Suitors included the Intendant of the Court of a Count of the Holy Roman Empire in December 1703, the Elector of Hanover's son (later George I of Great Britain) in June 1706, the Duke of Somerset's son Lord Hertford in 1707–1711, Count Nassau in 1709, and finally Lord Danby (grandson of Thomas Osborne, 1st Duke of Leeds) in 1711, before her father settled on Edward Harley, 2nd Earl of Oxford and Earl Mortimer.They were married on 31 August 1713, at Wimpole Hall.She brought, through inheritance, Welbeck Abbey in Nottinghamshire and Wimpole Hall in Cambridgeshire to her husband.They had two children.Their son, Henry Cavendish Harley, Lord Harley, lived only four days.Their only child to attain maturity was Margaret (1715–1785), and so whilst Margaret inherited most of the combined Holles-Harley fortunes on her parents' deaths, the title of Earl of Oxford and Earl Mortimer passed to Edward's cousin (also Edward).Henrietta Place (previously Henrietta Street) in Marylebone in the City of Westminster in central London was named after the Countess.Nearby Harley Street was named after her husband.The general area was owned by the Harleys and developed during their lifetimes, hence other streets are named after their family, too.This includes Oxford Street, Wigmore Street and Wimpole Street.She was buried 26 December 1755 in the Duke of Newcastle's vault in Westminster Abbey. [SEP] Knowledge 2: Robert Ellison (politician)
Robert Ellison (2 February 1614 – 12 January 1678) was an English politician who sat in the House of Commons at various times between 1647 and 1660.Ellison was the son of Cuthbert Ellison of Newcastle-upon-Tyne, a merchant adventurer, and his wife Jane Isle, daughter of Charles Isle.He was Sheriff of Newcastle in 1646.In 1647, Ellison replaced as Member of Parliament for Newcastle-upon-Tyne in the Long Parliament a member whose election had been declared void.He was secluded from sitting in the succeeding Rump Parliament.In 1660, he returned to Parliament as MP for Newcastle-upon-Tyne in the Convention Parliament.Ellison died at the age of 63.He had married firstly Elizabeth Grey, daughter of Cuthbert Grey of Newcastle, and secondly on 27 July 1672 Agnes Briggs, widow of James Broggs of Newcastle.

Answer: John Holles, 1st Duke of Newcastle