Hannah Arnold
Hannah Arnold, also known as Hannah Waterman King, was the grandmother of Benedict Arnolds children.
Sancha of León
Sancha of León( 8 November 1067) was a Queen of León.
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.
Theresa of Portugal, Queen of León
Theresa of Portugal (1176 – 18 June 1250) was Queen of Léon as the first wife of King Alfonso IX of León.
She was born the oldest daughter of Sancho I of Portugal and Dulce of Aragon.
When her marriage was annulled because of consanguinity, she retired to a convent.
She was beatified in 1705.
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.
Dulce of León
Dulce or Aldonza (born "c." 1195) was the second daughter of Alfonso IX of León by his first wife, Theresa of Portugal.
She was raised with her mother in Portugal after the annulment of her parents' marriage, along with her brother, Ferdinand, while her elder sister Sancha was raised at the court of their father in 1195.
After the death of Sancha's brother (1214), Alfonso IX named his second son, also Ferdinand, his heir, bestowing on him the title "infante" (1216).
In 1217, with the support of the aristocracy, Alfonso granted his daughters Sancha and Dulce the villages of Portela de San Juan, Burgo de Ribadavia and Allariz, to be ruled by them until their deaths, after which they would revert to the Crown.
In that same year, Ferdinand's mother, Berengaria, inherited the crown of the Kingdom of Castile, but ceded it to her son, who was proclaimed king at Valladolid on 2 July.
With his heir out of the kingdom and ruling in another place, Alfonso attempted to make his eldest daughters his joint heirs.
In the Treaty of Boronal concluded with Portugal in 1219, Alfonso expressly states that if he should die, Portugal should respect the agreement with his daughters.
On Alfonso's death on 24 September 1230, the people of León, who had pledged for Ferdinand in 1206, refused to recognise his daughters, and they in turn ceded their rights to his kingdom to their half-brother.
She was thirty-five years of age at the time.
This agreement, negotiated at Valencia de Don Juan by Berengaria, the queen mother, and Theresa, with Sancha and Dulce present, is known as the "pact of the mothers".
The treaty was signed Benavente and in compensation Ferdinand promised a yearly stipend of 30,000 "maravedíes" to each of his half-sisters and the lordship of certain castles.
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.
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.
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.
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.

Question: Who is the maternal grandmother of Dulce Of León?
Answer: Dulce of Aragon