Diana Guardato
Diana Guardato was a member of the aristocratic Patrician Guardato family, and had three children with King Ferdinand I: Diana Guardato is the 16th- Great Grandmother of His Royal Highness Albert II of Belgium, 15th- Great Grandmother of His Majesty Juan Carlos
I of Spain, 17th- Great Grandmother of Philippe of Belgium, 14th- Great Grandmother of His Majesty Manuel II of Portugal, 16th- Great Grandmother of Grand Duke Henri, as well as many others.
Robert O'Callaghan
Lieutenant- General Sir Robert William O'Callaghan( October 1777 – 9 June 1840) was a British Army officer and politician.
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.
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.
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.
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.
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.
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.

Question: Who is William Frederick Ormonde O'Callaghan's paternal grandmother?