Charles, Duke of Orléans
Charles of Orléans (24 November 1394 – 5 January 1465) was Duke of Orléans from 1407, following the murder of his father, Louis I, Duke of Orléans, on the orders of John the Fearless, Duke of Burgundy.
He was also Duke of Valois, Count of Beaumont-sur-Oise and of Blois, Lord of Coucy, and the inheritor of Asti in Italy via his mother Valentina Visconti, daughter of Gian Galeazzo Visconti, Duke of Milan.
He is now remembered as an accomplished medieval poet owing to the more than five hundred extant poems he produced, written in both French and English, during his 25 years spent as a prisoner of war and after his return to France.
Louis, Duke of Joyeuse
Louis de Lorraine, Duke of Joyeuse( 11 January 1622 – 27 September 1654, Paris) was a younger son of Charles, Duke of Guise and Henriette Catherine de Joyeuse.
Prince Henri of Orléans
Prince Henri of Orléans( 16 October 1867 – 9 August 1901) was the son of Prince Robert, Duke of Chartres, and Princess Françoise of Orléans.
Philip, Duke of Orléans
Philip of Orléans( 1 July 1336 at Vincennes – 1 September 1375 at Orléans) was a Duke of Orléans, Touraine, and Count of Valois, the fifth son of King Philip VI of France and his wife Joan the Lame.
His father named him Duke of Orléans, a newly created duchy, in 1344.
Louis I, Duke of Orléans
Louis I of Orléans (13 March 1372 – 23 November 1407) was Duke of Orléans from 1392 to his death.
He was also, Duke of Touraine (1386–1392), Count of Valois (1386?–1406)
Blois (1397–1407), Angoulême (1404–1407), Périgord (1400–1407) and Soissons (1404–07).
Louis was the second son of King Charles V of France and Joanna of Bourbon and was the younger brother of Charles VI.
In 1498, his heirs male inherited the French throne after the extinction of the Valois main line.
Philip, Count of Vertus
Philip of Orléans, Count of Vertus( 21/24 July 1396 – 1 September 1420), was the second son of Louis I, Duke of Orléans, and Valentina Visconti, and a grandson of Charles V of France.
His older brother was the noted poet Charles, Duke of Orléans and his younger brother was John, Count of Angoulême.
Anne of Orléans, Abbess of Fontevraud
Anne d' Orléans( 1464 – 1491 in Poitiers) was a French abbess.
She was the youngest child of Charles, Duke of Orléans and Maria of Cleves.
Her only brother became king Louis XII of France in 1498.
John, Count of Angoulême
John of Orléans, Count of Angoulême and of Périgord( 26 June 1399 – 30 April 1467), was a younger son of Louis I, Duke of Orléans, and Valentina Visconti, and a grandson of Charles V of France.
He was the younger brother of the noted poet, Charles, Duke of Orléans, and grandfather of Francis I of France.
John was taken hostage by the English in 1412, and not released until 1444.
In 1415 he was joined by his older brother Charles, with whom he shared an interest in literature.
He had to sell part of his estates to pay for his ransom, but still collected many books.
After that, he fought under the orders of his illegitimate half- brother, Dunois, driving the English out of Guyenne in 1451.
On 31 August 1449, he married Marguerite de Rohan, daughter of Alain IX of Rohan and Marguerite of Brittany.
They had three children:
He also had an illegitimate son, Jean de Valois, bastard of Angoulême, who was legitimised in 1458.
" Good Count John" died in 1467.
He is buried in the Cathedral of Angoulême.
Marie of Orléans, Viscountess of Narbonne
Marie of Orléans( 19 December/ September 1457 – 1493) was the elder sister of King Louis XII of France.
Due to her marriage to John of Foix, she was Countess of Étampes and Viscountess of Narbonne.
Marie was the eldest daughter of Charles, Duke of Orléans, and his third wife Marie of Cleves.
After a previous betrothal to Peter II, Duke of Bourbon, she married John of Foix on 8 September 1476.
Jean de Dunois
Jean d'Orléans, count of Dunois (23 November 1402 – 24 November 1468), known as the "Bastard of Orléans"  or simply Jean de Dunois, was a French military leader during the Hundred Years' War who participated in military campaigns with Joan of Arc.
He was the illegitimate son of Louis I, Duke of Orléans – himself a son of King Charles V of France – and his mistress Mariette d'Enghien.
His nickname, the "Bastard of Orléans", was a term of higher hierarchy and respect, since it acknowledged him as a first cousin to the king and acting head of a cadet branch of the royal family during his half-brother's captivity.
In 1439 he received the county of Dunois from his half-brother Charles, Duke of Orléans, and later king Charles VII made him count of Longueville.

Question: Who is Charles, Duke Of Orléans's paternal grandfather?