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.
Gülbahar Hatun (wife of Mehmed II)
Gülbahar Hatun( 1432 – 1492) was the consort of Sultan Mehmed II, and mother of Sultan Bayezid II of the Ottoman Empire and the grandmother of Selim I.
Elizabeth FitzHugh
Elizabeth FitzHugh( 1455/65- before 10 July 1507) was an English noblewoman.
She is best known for being the grandmother of Catherine Parr, sixth queen consort to Henry VIII, and her siblings Anne Herbert, Countess of Pembroke, and William Parr, 1st Marquess of Northampton.
Catherine, Princess of Asturias
Catherine of Castile (Castilian: "Catalina de Castilla"; 5 October 1422 - 17 September 1424) was "suo jure" Princess of Asturias and heiress presumptive to the Castilian throne all her life.
Catherine was born on 5 October 1422 in Illescas, Toledo.
She was the first child of King John II of Castile and his first wife, Maria of Aragon.
Named after her aunt and grandmother, the Duchess of Villena and Catherine of Lancaster, she immediately became heiress presumptive to the throne of Castile upon her birth.
The Infanta was formally recognised as successor to the throne of the kingdom and sworn in as Princess of Asturias on 1 January 1423 by the Cortes of Toledo.
However, the Princess of Asturias did not live long enough to succeed her father as Queen of Castile.
She died in Madrigal de las Altas Torres on 17 September 1424.
Her younger sister, Infanta Eleanor, replaced her as heiress and Princess of Asturias.
Princess Catherine is buried in Miraflores Charterhouse, along with her father and stepmother, Isabella of Portugal.
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.
Maria of Aragon, Queen of Castile
Maria of Aragon  was the Queen consort of Castile and Leon as the wife of John II of Castile.
She was the daughter of Ferdinand I of Aragon and Eleanor of Alburquerque.
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.
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.
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.

Question: Who is the maternal grandmother of Catherine, Princess Of Asturias?
Answer: Eleanor of Alburquerque