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.
Ferdinand Philippe, Duke of Orléans
Prince Ferdinand Philippe of Orléans (3 September 1810 – 13 July 1842) was the eldest son of Louis Philippe d'Orléans, Duke of Orléans (the future King Louis Philippe I) and Maria Amalia of Naples and Sicily.
Born in exile in his mother's native Sicily, he was heir to the House of Orléans from birth.
Following his father's succession as King of the French in 1830, he became the "Prince Royal" and subsequently Duke of Orléans (French: "Duc d'Orléans"), the title by which he is best known.
He died in 1842, never to succeed his father or see the collapse of the July Monarchy and subsequent exile of his family to England.
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.
Charles V of France
Charles V (21 January 1338 – 16 September 1380), called the Wise , was King of France from 1364 to his death.
His reign marked a high point for France during the Hundred Years' War, with his armies recovering much of the territory held by the English, and successfully reversed the military losses of his predecessors.
In 1349, as a young prince, Charles received from his grandfather King Philip VI the province of Dauphiné to rule.
This allowed him to bear the title "Dauphin" until his coronation, which led to the integration of the Dauphiné into the crown lands of France.
After 1350, all heirs apparent of France bore the title of Dauphin until their accession.
Charles became regent of France when his father John II was captured by the English at the Battle of Poitiers in 1356.
To pay for the defense of the kingdom, Charles raised taxes.
As a result, he faced hostility from the nobility, led by Charles the Bad, King of Navarre; the opposition of the French bourgeoisie, which was channeled through the Estates-General led by Étienne Marcel; and with a peasant revolt known as the Jacquerie.
Charles overcame all of these rebellions, but in order to liberate his father, he had to conclude the Treaty of Brétigny in 1360, in which he abandoned large portions of south-western France to Edward III of England and agreed to pay a huge ransom.
Charles became king in 1364.
With the help of talented advisers, his skillful management of the kingdom allowed him to replenish the royal treasury and to restore the prestige of the House of Valois.
He established the first permanent army paid with regular wages, which liberated the French populace from the companies of routiers who regularly plundered the country when not employed.
Led by Bertrand du Guesclin, the French Army was able to turn the tide of the Hundred Years' War to Charles' advantage, and by the end of Charles' reign, they had reconquered almost all the territories ceded to the English in 1360.
Furthermore, the French fleet, led by Jean de Vienne, managed to attack the English coast for the first time since the beginning of the Hundred Years' War.
Charles V died in 1380.
He was succeeded by his son Charles VI, whose disastrous reign allowed the English to regain control of large parts of France.
Valentina Visconti, Duchess of Orléans
Valentina Visconti (1371 – 4 December 1408) was a Sovereign Countess of Vertus, and Duchess consort of Orléans as the wife of Louis de Valois, Duke of Orléans, the younger brother of King Charles VI of France.
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.
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.
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 Joseph, Duke of Guise
Louis Joseph de Lorraine" Duke of Guise" and Duke of Angoulême,( 7 August 1650 – 30 July 1671) was the only son of Louis, Duke of Joyeuse and Marie Françoise de Valois, the only daughter of Louis- Emmanuel d' Angoulême, Count of Alès, Governor of Provence and son of Charles de Valois Duke of Angoulême, a bastard of Charles IX of France.
Margaret, Countess of Vertus
Margaret, Countess of Vertus( French:" Marguerite d' Orléans"; 4 December 1406 – 1466), was a French vassal, Countess of Vertus and Etampes 1420 – 1466.
She was the daughter of Louis I, Duke of Orléans, and Valentina Visconti.

Question: When did Louis I, Duke Of Orléans's father die?
Answer: 16 September 1380