Hüma Hatun
Hüma Hatun (1410 ‒ September 1449) was the fourth wife of Ottoman Sultan Murad II and mother of Mehmed II and the grandmother of Bayezid II.
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.
Tjuyu
Tjuyu( sometimes transliterated as Thuya or Thuyu) was an Egyptian noblewoman and the mother of queen Tiye, and the wife of Yuya.
She is the grandmother of Akhenaten, and great grandmother of Tutankhamun.
Sir Edward Buxton, 2nd Baronet
Sir Edward North Buxton, 2nd Baronet (16 September 1812 – 11 June 1858) was a British Liberal Party politician.
He was the son of Sir Thomas Fowell Buxton and his wife, Hannah Gurney (1783–1872).
He married Catherine Gurney (1814–1911), daughter of Samuel Gurney (1786–1856) of the Norwich Gurney family, on 12 April 1836.
He became 2nd Baronet Buxton of Bellfield and Runton on 19 February 1845, on the death of his father.
He served as Member of Parliament for Essex South from 1847 to 1852 and for East Norfolk from 1857 until his death in 1858.
He died on 11 June 1858, leaving 7 sons and 5 daughters.
He was succeeded as 3rd Baronet by his eldest son, Thomas Fowell Buxton, (26 January 1837 – 28 October 1915).
Another of his sons, with the same name as himself, lived 1 September 1840 – 9 January 1924 and was elected MP for Walthamstow in 1885.
Mona Hopton Bell
Mona Hopton Bell( 1867- 1940) was a British artist, best known for her portraits of civic figures.
She was the grandmother of the painter Jean H. Bell.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Anne Denman
Anne Denman( 1587–1661) was born in Olde Hall, Retford, Nottinghamshire.
Through a fortunate second marriage with Thomas Aylesbury, she became the grandmother of Lady Anne Hyde, Duchess of York and great- grandmother of Queen Mary II and Queen Anne.
Kaoru Hatoyama
After the elections of 2009, she became more widely known as the grandmother of Prime Minister Yukio Hatoyama and his politician brother Kunio Hatoyama.
Francis Buxton
Francis William Buxton (5 August 1847 – 14 November 1911) was a British barrister and Liberal Party politician.
Buxton was the son of Sir Edward Buxton, 2nd Baronet, and the grandson of the anti-slavery campaigner Sir Thomas Buxton, 1st Baronet.
His mother was Catherine, daughter of Samuel Gurney, while Sir Thomas Buxton, 3rd Baronet, was his elder brother, Charles Buxton his uncle, Noel Noel-Buxton, 1st Baron Noel-Buxton, his nephew and Sydney Buxton, 1st Earl Buxton, his first cousin.
He was born at Colne House, Cromer, Norfolk, and educated at Trinity College, Cambridge, graduating B.A. in 1869 before training for the bar at Lincoln's Inn.
Called to the Bar in 1874, he became a partner in the London banking firm of Prescott and Company.
Between 1880 and 1885 he sat as Member of Parliament for Andover.
He was also a Justice of the Peace for the County of London and for Hertfordshire, a Public Works Loan Commissioner in 1893 and a member of the London School Board from 1899 to 1904.
He was also a member of the council of the Girls' Public Day School Company, 1886–1903, and one of its vice-presidents from 1903.
Buxton married the Hon.
Mary Emma, daughter of John Lawrence, 1st Baron Lawrence, in 1872.
Their sons included John Lawrence Buxton, a brigadier in the British Army and Robert Vere Buxton DSO, a cricketer, soldier and banker.
Buxton died in Marylebone, London in November 1911, aged 64.
His wife was appointed an OBE in 1918.
She died in February 1939.
Gülbahar Hatun (wife of Mehmed II)
Gülbahar Hatun( 1432 – 1492) was the consort of Sultan Mehmed II, and mother of Sultan Bayezid II of the Ottoman Empire and the grandmother of Selim I.

Question: Who is Francis Buxton's paternal grandmother?
Answer: Hannah Gurney