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.
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.
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.
Marie of Blois, Duchess of Anjou
Marie of Blois( 1345- 1404) was a daughter of Joanna, Duchess of Brittany and Charles, Duke of Brittany.
Through marriage to Louis I, Duke of Anjou, she became Duchess of Anjou, Countess of Maine, Duchess of Touraine, titular Queen of Naples and Jerusalem and Countess of Provence.
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.
Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Charles, Duke of Durazzo
Charles of Durazzo (1323 – 23 January 1348) was a Neapolitan nobleman, the eldest son of John, Duke of Durazzo and Agnes of Périgord.
Joanna, Duchess of Brabant
Joanna, Duchess of Brabant( 24 June 1322 – 1 November 1406), also known as Jeanne, was a ruling Duchess of Brabant from 1355 until her death.
She was the heiress of Duke John III, and Marie d' Évreux.
Joanna, Duchess of Durazzo
Joanna of Durazzo (1344 – 20 July 1387) was the eldest daughter and eldest surviving child of Charles, Duke of Durazzo, and his wife, Maria of Calabria.
She succeeded as duchess on the death of her father in 1348 when she was only a child of four years old.
Joanna was a member of the House of Anjou-Durazzo.
She reigned as Duchess of Durazzo from 1348-1368.
She married twice; firstly to Louis of Navarre and then to Robert IV of Artois, Count of Eu.
Louis, Count of Gravina
Louis of Durazzo (1324 – 22 July 1362) was Count of Gravina and Morrone.
He was the son of John of Gravina and Agnes of Périgord.
In 1337, he was named Vicar- and Captain-General of the Kingdom of Albania.
During the ascension of the Durazzeschi at the court of Naples during the reign of Joanna I, he was one of the royal ambassadors to the Roman Curia.
Upon the invasion of Louis I of Hungary and the execution of his elder brother, Charles, Duke of Durazzo, in 1348, he was imprisoned, with his younger brother Robert of Durazzo, until 1352.
The rest of his life was spent stirring up revolts against Joanna in Apulia with the aid of some Free Companions.
These were ultimately quashed in 1360 by Louis of Taranto, and Louis of Durazzo was imprisoned in the Castel dell'Ovo in Naples and murdered by poison.

Question: Who is Joanna, Duchess Of Durazzo's paternal grandmother?
Answer: Agnes of Périgord