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.
Lyon Cohen
Lyon Cohen( 1868–1937) was a Polish- born Canadian businessman and a philanthropist.
He was the grandfather of singer/ poet Leonard Cohen.
Guillaume Wittouck
Guillaume Wittouck( 1749- 1829) was a Belgian lawyer and High Magistrate.
He was the Grandfather of industrialist Paul Wittouck.
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.
Abd al-Muttalib
Abd al- Muttalib Shaybah ibn Hashim( c. 497 – 578) was the grandfather of Islamic prophet Muhammad.
John Westley
Rev. John Westley( 1636 – 78) was an English nonconformist minister.
He was the grandfather of John Wesley( founder of Methodism).
Agnès of Navarre
Agnès of Navarre  (1334 – 1396) was the daughter of Philip III of Navarre and Joan II of Navarre, and became Countess of Foix on marriage to Gaston III, Count of Foix.
She was rumoured to have had an affair with poet Guillaume de Machaut and so inspired his poem "Le Voir Dit".
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.
Joan II of Navarre
Joan II (28 January 1312 – 6 October 1349) was Queen of Navarre from 1328 until her death.
She was the only surviving child of Louis X of France, King of France and Navarre, and Margaret of Burgundy.
Joan's paternity was dubious because her mother was involved in a scandal, but Louis X declared her his legitimate daughter before he died in 1316.
However, the French lords were opposed to the idea of a female monarch and elected Louis X's brother, Philip V, king.
The Navarrese noblemen also paid homage to Philip.
Joan's maternal grandmother, Agnes of France, Duchess of Burgundy, and uncle, Odo IV of Burgundy, made attempts to secure the counties of Champagne and Brie (which had been the patrimony of Louis X's mother, Joan I of Navarre) to Joan, but the French royal troops defeated her supporters.
After Philip V married his daughter to Odo and granted him two counties as her dowry, Odo renounced Joan's claim to Champagne and Brie in exchange for a compensation in March 1318.
Joan married Philip of Évreux, who was also a member of the French royal family.
Philip V was succeeded by his brother, Charles IV, in both France and Navarre in 1322, but most Navarrese lords refused to swear loyalty to him.
After Charles IV died in 1328, the Navarrese expelled the French governor and declared Joan the rightful monarch of Navarre.
In France, Philip of Valois was crowned king.
He concluded an agreement with Joan and her husband, who renounced Joan's claims to Champagne and Brie in exchange for three counties, while Philip acknowledged their right to Navarre.
Joan and her husband were together crowned in Pamplona Cathedral on 5 March 1329.
The royal couple closely cooperated during their joint reign, but Philip of Évreux was more active.
However, they mostly lived in their French domains.
Navarre was then administered by governors during their absence.
Henry Bryant (naturalist)
Henry Bryant( May 12, 1820 – February 2, 1867) was an American physician and naturalist.
He was the grandfather of Henry Bryant Bigelow.

Question: Who is the maternal grandfather of Agnès Of Navarre?
Answer: Louis X of France