Infante Miguel, Duke of Viseu
Infante Dom Miguel, Duke of Viseu( born 3 December 1946) is a member of the Portuguese royal family, as the second child of Duarte Nuno, Duke of Braganza, and Princess Maria Francisca of Orléans- Braganza.
The Duke of Viseu is fourth in the Line of succession to the former Portuguese throne, behind his elder brother, Duarte Pio, Duke of Braganza, and his three children.
The Duke of Viseu is a noted patron of the arts and painter, and the founder and sponsor of the annual Luso- Brazilian Week of Aldravist Art, held interchangeably between Portugal and Brazil.
He is also an active member in various orders of chivalry, notably the Sovereign Military Order of Malta and the Sacred Military Constantinian Order of Saint George.
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.
Dinis of Braganza, Count of Lemos
Dinis of Braganza( 1481 – 1516) was the younger son of Fernando II, Duke of Braganza and Isabella of Viseu who was a daughter of Infante Fernando, Duke of Viseu and Beatrice of Portugal.
Ferdinand, Duke of Viseu
Infante Ferdinand, Duke of Viseu and Beja (or "Fernando," , 1433 – 1470) was the third son of Edward, King of Portugal and his wife Eleanor of Aragon.
João, Duke of Viseu
Infante João of Viseu( c. 1448 1472) was the older son of Infante Fernando, Duke of Viseu and of his wife Infanta Beatrice of Portugal.
In 1470, following his father's death, he inherited the titles of Duke of Viseu and Duke of Beja, as well as the Lordships of Covilhã and Moura.
He also became Master of the Order of Christ and of the Order of Santiago, becoming also Constable of Portugal.
In July 1472, his uncle, King Afonso V granted him the Moroccan city of Anfa( in Portuguese" Anafé").
He died young and single, without issue.
His brother, Infante Diogo, inherited his titles and estates.
Eleanor of Aragon, Queen of Portugal
Eleanor of Aragon (2 May 1402 – 19 February 1445) was queen consort of Portugal as the spouse of Edward I of Portugal and the regent of Portugal as the guardian of her son.
She was the daughter of Ferdinand I of Aragon and Eleanor of Alburquerque.
Diogo, Duke of Viseu
Infante Diogo of Viseu( 1450 – 1484) was the second son of Ferdinand, Duke of Viseu, and his wife Beatriz, Duchess of Viseu.
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.
Isabel of Viseu
Isabel of Viseu( 1459 – 1521) was a daughter of Infante Fernando, Duke of Viseu and his wife and cousin Infanta Beatrice, Duchess of Viseu.
She was a member of the House of Aviz and later, House of Braganza.
John, Prince of Portugal (1451)
John, Prince of Portugal was a Portuguese infante, son of Afonso V and Isabella of Coimbra.
He was born heir to the throne in 1451, but he died young during the same year.
The title of Prince of Portugal then passed again to Infante Ferdinand, Duke of Viseu, his uncle.

Question: Who is Ferdinand, Duke Of Viseu's maternal grandmother?
Answer: Eleanor of Alburquerque