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.
Purnima (Hindi actress)
Purnima Das Verma( born Meherbhano Mohammad Ali) was an Indian film actress who worked predominantly in Hindi language films.
She is the grandmother of actor Emraan Hashmi.
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.
Prince Augustus Frederick, Duke of Sussex
Prince Augustus Frederick, Duke of Sussex, (27 January 1773 – 21 April 1843) was the sixth son and ninth child of King George III and his queen consort, Charlotte of Mecklenburg-Strelitz.
He was the only surviving son of George III who did not pursue an army or navy career.
He was known for his liberal views, which included reform of Parliament, abolition of the slave trade, Catholic emancipation, and the removal of existing civil restrictions on Jews and dissenters.
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.
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.
Augusta Emma Wilde, Baroness Truro
Augusta Emma Wilde, Baroness Truro (née d'Este; 11 August 1801 – 21 May 1866) was the daughter of Prince Augustus Frederick (sixth son of King George III), later Duke of Sussex, by his marriage with Lady Augusta Murray, second daughter of John Murray, 4th Earl of Dunmore, and Lady Charlotte Stewart.
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.
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 Augusta Emma Wilde, Baroness Truro?
Answer: Charlotte of Mecklenburg-Strelitz