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.
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.
Sir Archibald Campbell, 2nd Baronet
Sir Archibald Campbell of Succoth, Lord Succoth,
2nd Baronet (1 August 1769 – 23 July 1846) was a Scottish advocate and judge.
His country house was Garscube House, succeeding to the estate in 1823, upon his father's death.
He rebuilt the house at Garscube in 1827, to a design by William Burn.
He added Cumlodden, Blairwhoisk, Sommerson and Gartowhern to the family estate.
The son of Sir Ilay Campbell and Susan Mary Murray, he was admitted to the Faculty of Advocates in 1791, and in 1809 became a Senator of the College of Justice under the judicial title Lord Succoth.
A member of the Highland Society (1813), he was elected a Fellow of the Royal Society of Edinburgh on 4 June 1821, upon the proposal of Alexander Maconochie.
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.
John Campbell (1798–1830)
John Campbell (28 May 1798 – 3 July 1830) was a Scottish advocate and politician.
He was the eldest surviving son of judge Sir Archibald Campbell, 2nd Baronet (Lord Succoth) of Succoth, Dunbarton, educated at Harrow School and became an advocate in 1821.
He predeceased his father, who died in 1846.
He was the Member of Parliament (MP) for Dunbartonshire from 1826–1830.
He married Anna Jane Sitwell, daughter of Francis Sitwell.
His eldest son Archibald Campbell (1825–66) succeeded John's father as 3rd Baronet and was Conservative MP for Argyllshire, 1851-57.
He was in turn succeeded by his younger brother George Campbell, 4th Baronet (1829–74).
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
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.
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.
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.

Question: Who is the paternal grandmother of John Campbell (1798–1830)?
Answer: Susan Mary Murray