Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Fujiwara no Nagara
, also known as Fujiwara no Nagayoshi, was a Japanese statesman, courtier and politician of the early Heian period.
He was the grandfather of Emperor Yōzei.
Prithvipati Shah
Prithvipati Shah( ?–1716) was the king of the Gorkha Kingdom in the Indian subcontinent, present- day Nepal.
He was the grandfather of Nara Bhupal Shah.
Sancha of León
Sancha of León( 8 November 1067) was a Queen of León.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
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.
Kaya Alp
Kaya Alp was, according to Ottoman tradition, the son of Kızıl Buğa and the father of Suleyman Shah, who was, in turn, the grandfather of Ertuğrul, and the great grandfather of the Ottoman Empire founder, Osman I.
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.

Question: Who is the maternal grandfather of Dulce Of León?
Answer: Sancho I of Portugal