Renauld II, Count of Nevers
Renauld II, Count of Nevers and Auxerre( died 1089) was the son of William I of Nevers, Count of Nevers and Ermengarde of Tonnerre.
He married Ida, daughter of Artald V, Count of Forez.
They had a child: Later he married Agnes of Beaugency.
They had:
William III, Count of Nevers
William III, Count of Nevers( c. 1107 – 21 November 1161) was Count of Nevers, Auxerre and Tonnerre( 1148 – 1161).
He was born in Auxerre.
Louis I, Count of Nevers
Louis I( 1272 – 22 July 1322) was" suo jure" Count of Nevers and" jure uxoris" Count of Rethel.
Louis was a son of Robert III, Count of Flanders, and Yolande, Countess of Nevers.
He succeeded his parents as Count of Nevers.
In December 1290, he married Joan, Countess of Rethel, and thus became her co-ruler in the County of Rethel.
They had two children:
He died in Paris shortly before his father and thus never succeeded his father as Count of Flanders.
William I, Count of Nevers
William I, Count of Nevers, was the son of Renauld I, Count of Nevers and Hedwig of France, Countess d' Auxerre.
In 1040 he succeeded his father as Count of Nevers and d'Auxerre and in 1065 he was also the Count of Tonnerre.
He married Ermengarde, daughter of Renauld, Count of Tonnerre about 1039.
William died at Nevers 20 June 1100.
William I and Ermengarde had six children:
William IV, Count of Nevers
William IV, Count of Nevers,( c. 1130 – Acre, 24 October 1168) Count of Nevers, Auxerre and Tonnerre( 1161 – 1168).
Francis I, Duke of Nevers
Francis I of Cleves,( 2 September 1516 – 13 February 1561) was a commander in the French Royal Army and the first Duke of Nevers.
He participated in the suppression of the Amboise conspiracy.
The only son of Charles II of Nevers( died in the Louvre in 1521) and Marie d' Albret, Countess of Rethel, Francis succeeded his father as Count of Nevers and Eu. In 1539 he became Duke of Nevers.
When his mother died in 1549, he also inherited the title of Count of Rethel.
In 1538, Francis married Marguerite of Bourbon- La Marche( 1516 – 1589), daughter of Charles de Bourbon, Duke of Vendôme and Françoise of Alençon.
They had five children:
Charles I, Count of Nevers
Charles I, Count of Nevers (1414 – 25 May 1464), Count of Nevers and Rethel, was the son of Philip II, Count of Nevers, and Bonne of Artois.
Towards the end of the life of Philip III, Duke of Burgundy, Charles fell under suspicion of practising witchcraft, in an effort to supplant Charles, Count of Charolais, as the heir.
Charles I fled to France and died soon after.
He married Marie d'Albret, daughter of Charles II d'Albret on 11 June 1456, but had no legitimate children.
He was succeeded by his brother John.
Philip II, Count of Nevers
Phillip II, Count of Nevers (October 1389, Villaines-en-Duesmois – 25 October 1415, Agincourt) was the youngest son of Philip the Bold and Margaret III of Flanders.
He succeeded his brothers, John the Fearless and Anthony, Duke of Brabant, as Count of Nevers and Rethel respectively after each of them acceded to their duchies.
He married in Soissons, on 9 April 1409, Isabelle de Coucy (d. 1411), daughter of Enguerrand VII de Coucy and Isabelle of Lorraine.
They had two children:
He married again, in Beaumont-en-Artois on 20 June 1413, Bonne of Artois, daughter of Philip of Artois, Count of Eu.
They had two sons:
He also had four illegitimate children by various mistresses.
In spite of his elder brother John's ambivalent position and ultimate refusal to come to the aid of the royal army in the face of the English invasion of Henry V in 1415, Philip was with the French army at the Battle of Agincourt, and both he and his brother Anthony were killed in the battle.
He was succeeded by his son Charles.
Engelbert, Count of Nevers
Engelbert of Cleves, Count of Nevers( 26 September 1462 – 21 November 1506) was the younger son of John I, Duke of Cleves and Elizabeth of Nevers, only surviving child of John II, Count of Nevers.
In 1481, he was sent with a large army to the Bishopric of Utrecht by his brother John II, Duke of Cleves where they successfully ousted David of Burgundy.
But after the Siege of Utrecht( 1483) he had to flee, and Utrecht returned to the control of Burgundy.
He married Charlotte of Bourbon- Vendôme, daughter of John VIII, Count of Vendôme, circa 1489.
Their son Engelbert became Count of Nevers and Eu in 1491 upon the death of his maternal grandfather John II, Count of Nevers.
His eldest brother John II( 1458 – 1521) inherited Cleves.
John II, Count of Nevers
John II, Count of Nevers( known as Jean de Clamecy, prior to acquiring title of" Count of Nevers"; 1415–1491) was a French noble.

Question: Who is Charles I, Count Of Nevers's paternal grandfather?
Answer: Philip the Bold