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.
Luísa, Duchess of Cadaval
Luísa of Braganza, Duchess of Cadaval
(January 9, 1679 in Lisbon – December 23, 1732 in Évora) was a natural daughter of Portuguese King Peter II and a Portuguese lady named Maria da Cruz Mascarenhas.
She was raised among the family of secretary of state Francisco Correia de Lacerda and after that at the Monastery of Carnide with her aunt Maria of Braganza
(natural daughter of John IV of Portugal).
Luísa married D. Luís and after his death married D. Jaime de Melo, respectively 2nd and 3rd dukes of Cadaval.
She died in Évora, Alentejo, and is buried at the Convent of Saint John the Evangelist in the same city.
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.
Louisa Montagu Douglas Scott, Duchess of Buccleuch
Louisa Jane Montagu Douglas Scott, Duchess of Buccleuch and Queensberry( 26 August 1836 – 16 March 1912) was the daughter of James Hamilton, 1st Duke of Abercorn.
In 1884, she became the Duchess of Buccleuch and Duchess of Queensberry, the wife of William Henry Walter Montagu Douglas Scott, 6th Duke of Buccleuch& 8th Duke of Queensberry.
She was the paternal grandmother of Princess Alice, Duchess of Gloucester and of Marian Louisa, Lady Elmhirst, as well as the maternal great- grandmother of Prince William of Gloucester, Prince Richard, Duke of Gloucester and great- great- grandmother of Sarah, Duchess of York.
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.
Diana Álvares Pereira de Melo, 11th Duchess of Cadaval
" Dona" Diana Álvares Pereira de Melo, Princess of Orléans, 11th Duchess of Cadaval, Duchess of Anjou( born 25 July 1978), more commonly known as Diana de Cadaval, is a Portuguese author and noblewoman.
She is the eldest daughter of" Dom" Jaime Álvares Pereira de Melo, 10th Duke of Cadaval, and his second wife, Claudine Marguerite Marianne Tritz.
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.
Peter II of Portugal
"Dom" Pedro II (Peter II; 26 April 1648 – 9 December 1706), nicknamed "the Pacific", was the King of Portugal from 1683 until his death, previously serving as regent for his brother Afonso VI from 1668 until his own accession.
He was the fifth and last child of John IV and Luisa de Guzmán.
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.

Question: Who is Luísa, Duchess Of Cadaval's paternal grandmother?
Answer: Luisa de Guzmán