Éléonore Desmier d'Olbreuse
Éléonore Marie Desmier d'Olbreuse (3 January 1639 – 5 February 1722) was the wife of George William, Duke of Lauenburg and Prince of Celle.
She was the mother of Sophia Dorothea of Celle, who was the wife of George I of Great Britain.
Thus she is the maternal grandmother of George 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.
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.
Cornelius O'Callaghan, 1st Viscount Lismore
Cornelius O'Callaghan, 1st Viscount Lismore PC
(I) (2 October 1775 – 30 May 1857) was an Irish Whig politician.
He was the son of Cornelius O'Callaghan, 1st Baron Lismore and Frances Ponsonby.
He succeeded to his father's title on 12 July 1797 and assumed his seat in the Irish House of Lords.
On 30 May 1806 he was created Viscount Lismore in the Peerage of Ireland.
From 1806 to 1807 he sat in the House of Commons of the United Kingdom as a Member of Parliament (MP) for Lostwithiel, a rotten borough in Cornwall controlled by Lord Mount Edgcumbe.
In 1835 he was made a Member of the Privy Council of Ireland.
In 1838 he was made Baron Lismore in the Peerage of the United Kingdom, giving him and his descendants an automatic seat in the British House of Lords.
He served as Lord Lieutenant of Tipperary between 20 October 1851 and his death in 1857.
He married Lady Eleanor Butler, daughter of John Butler, 17th Earl of Ormonde and Lady Frances Susan Elizabeth Wandesford, on 11 August 1808.
They divorced in 1826.
He was succeeded in his title by his third and only surviving son, George O'Callaghan.
William Frederick Ormonde O'Callaghan
The Hon. William Frederick Ormond O'Callaghan( 14 November 1852 – 20 April 1877) was an Irish Home Rule League politician.
Born in London, he was the second son of George O' Callaghan, 2nd Viscount Lismore and his wife, Mary Norbury.
He was educated at Eton.
He was elected one of two Member of Parliaments( MPs) for Tipperary in 1874, but died in 1877 before completing a full term.
He died at his home in London after a week's illness.
He was buried at Kensal Green Cemetery.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
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.
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.
George O'Callaghan, 2nd Viscount Lismore
George Ponsonby O'Callaghan, 2nd Viscount Lismore (16 March 1815 – 29 October 1898) was an Irish peer and British Army officer.
He was the third and only surviving son of Cornelius O'Callaghan, 1st Viscount Lismore and Lady Eleanor Butler.
He commissioned into the 17th Lancers and served with the regiment in the Crimean War.
He held the office of High Sheriff of Tipperary in 1853.
On 30 May 1857 he succeeded to his father's titles and assumed his seat in the House of Lords.
He also succeeded his father as Lord Lieutenant of Tipperary and held the position until 1885.
He married Mary Norbury, daughter of George Norbury, on 25 July 1839, and together they had two sons.
Both sons, however, predeceased Lord Lismore and his titles became extinct upon his death.

Question: Who is George O'Callaghan, 2Nd Viscount Lismore's paternal grandmother?
Answer: Frances Ponsonby