Isabella of Navarre, Viscountess of Rohan
Isabel d' Albret of Navarre( 1512–1555) was the daughter of John III of Navarre( died 1516) and Catherine I of Navarre, sister and heiress of Francis Phoebus, King of Navarre.
As heir apparent, her brother rose to the throne in 1517 as Henry II of Navarre, grandfather of King Henry III of Navarre( Henry IV of France).
Beatrice of Navarre, Countess of La Marche
Beatrice of Navarre( 1392-1412/1415) was a daughter of Charles III of Navarre and his wife, Eleanor of Castile.
Rodrigo de Esparza
Rodrigo de Esparza( 13?-1423) was a Basque nobleman, Mosén and Chamberlain of King Charles III of Navarre.
Charles III of Navarre
Charles III (1361 – 8 September 1425), called the Noble, was King of Navarre from 1387 to his death and Count of Évreux from 1387 to 1404, when he exchanged it for the title Duke of Nemours.
He spent his reign improving the infrastructure of his kingdom, restoring Navarre's pride after the dismal reign of his father, Charles the Bad, and mending strained relations with France.
Charles III was born at Mantes-la-Jolie, the son of Charles II of Navarre and Joan of Valois.
He married Eleanor, daughter of Henry II of Castile, in 1375, putting an end to the conflict between Castile and Navarre.
On 25 July 1390, Charles named Joanna as his heir to Navarre.
Yet in 1397 his son, Charles, would be recognized as heir to Navarre.
As king, his politics were peace with France, Castile, Aragon, and England, support for the Avignon Papacy, and matrimonial alliance.
He collaborated with Castile in a war on the Kingdom of Granada.
By the Treaty of Paris, he abandoned his claims to Champagne and Brie and made peace with France.
Charles created the title Prince of Viana for the heir to the throne, entitling his grandson Charles in 1423.
He was a patron of the arts and he finished construction on the great Gothic Cathedral of Pamplona.
When it comes to Navarre's home policy, he decreed the watershed unification of Pamplona's boroughs in 1423, after over three centuries of division and rivalry.
He also built the royal palace at Tafalla and the Royal Palace of Olite, where he died in 1425.
Blanche I of Navarre
Blanche I( 6 July 1387 – 1 April 1441) was Queen of Navarre from her father King Charles III of Navarre's death in 1425 until her own death.
She served as Regent of Sicily in 1404– 05 and in 1408 – 15.
Charles II of Navarre
Charles II (10 October 1332 – 1 January 1387), called Charles the Bad, was King of Navarre 1349–1387 and Count of Évreux 1343–1387.
Besides the Pyrenean Kingdom of Navarre, he had extensive lands in Normandy, inherited from his father, Count Philip of Évreux, and his mother, Queen Joan II of Navarre, who had received them as compensation for resigning her claims to France, Champagne, and Brie in 1328.
Thus, in Northern France, Charles possessed Évreux, Mortain, parts of Vexin, and a portion of Cotentin.
He was a major player at a critical juncture in the Hundred Years' War between France and England, repeatedly switching sides in order to further his own agenda.
His horrific death by burning was widely considered God's justice upon him.
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.
Isabella of Navarre, Countess of Armagnac
Isabella of Navarre( 1395 – 31 August 1450) was the younger surviving daughter of Charles III of Navarre and his wife Eleanor of Castile.
She was a member of the House of Évreux.
Joan of Navarre (regent)
Joan of Navarre( 1382 – July 1413) was the heir presumptive to the throne of Navarre in 1402 – 1413, and regent of Navarre in the absence of her father in 1409 – 1411.
She was the eldest child of King Charles III of Navarre by his wife Eleanor, daughter of King Henry II of Castile.
René I, Viscount of Rohan
René I de Rohan,( 1516–1552) 18th Viscount of Rohan, Viscount and Prince de Léon, and Marquis de Blain married Isabella of Navarre daughter of jure uxoris King John III of Navarre and Catherine of Navarre, Queen of Navarre.

Question: Who is Charles Iii Of Navarre's paternal grandmother?
Answer: Joan II of Navarre