Robert I, Count of Artois
Robert I (25 September 1216 – 8 February 1250), called the Good, was the first Count of Artois, the fifth (and second surviving) son of Louis VIII of France and Blanche of Castile.
William XII, Count of Auvergne
William XII of Auvergne( 1300 – 1332) was Count of Auvergne and Count of Boulogne between 1325 and 1332.
He was the eldest son of Robert VII of Auvergne and Blanche of Bourbon, daughter of Robert, Count of Clermont.
He married Margaret of Évreux( 1307 – 1350), daughter of Louis, Count of Évreux and Margaret of Artois .< br>
William died young and had only one daughter:
Robert, Count of Burgundy
Robert, Count of Burgundy( 1300 – 1315) was the son of Otto IV, Count of Burgundy and Mahaut, Countess of Artois.
He was count of Burgundy between 1302 and 1315.
He died in 1315, and was succeeded by his sister, Joan II, and brother- in- law, Philip II, later queen and king of France.
Margaret of Artois
Margaret of Artois( 1285–1311) was the eldest child of Philip of Artois and his wife, Blanche of Brittany.
She was a member of the House of Artois.
She was married to Louis d'Évreux.
By her marriage, Margaret was Countess consort of Évreux.
Joan of Valois, Countess of Beaumont
Joan of Valois (1304–1363) was the daughter of Charles of Valois and his second wife Catherine I of Courtenay, titular empress of Constantinople.
Half sister to Philip VI of Valois, in around 1320 she married Robert III of Artois, Count of Beaumont-le-Roger and seigneur of Conches.
They had five known children:
Robert III of Artois had attempted to recover the title of count of Artois, which had been taken from him by his aunt Mahaut of Artois, but was condemned and exiled in 1331 for making and presenting forged documents in the process of filing against her.
Joan of Valois and their children were therefore imprisoned by order of her half-brother Philip VI.
Thierry Larchier d'Hirson
Thierry Larchier d' Hirson or d' Hireçon, or de Hérisson,( 1270 in Bourbonnais – 23 August 1328) was a French cleric under Robert II, Count of Artois.
Hirson was employed by Philip IV of France on several occasions.
He became a canon of Arras in 1299; chancellor of Mahaut, Countess of Artois in 1303; provost of Aire- sur- la- Lys in 1309; and was appointed Bishop of Arras in April 1328.
He died on 23 August 1328.
Hirson was involved with Jeanne de Divion, who, in revenge for what she did not inherit upon the bishop's death, procured false documents for Robert III of Artois so that he could recover the County of Artois, which had been bestowed upon his great aunt Mahaut, Countess of Artois, in a legal dispute.
Thuringbert, Count of Hesbaye
Thuringbert (735–770), Count of Hesbaye and Count of Wormsgau, son of Robert I, Count of Hesbaye, and Williswinda.
Thuringbert and his wife (name unknown) had one child:
Thuringbert was succeeded as Count of Hesbaye by his son Robert.
Robert IV of Artois, Count of Eu
Robert IV of Artois( 1356 – July 20, 1387), son of John of Artois, Count of Eu and Isabeau of Melun, was Count of Eu from April to July 1387.
About 1376, he married Joanna of Durazzo, daughter of Charles, Duke of Durazzo.
Robert IV inherited the County of Eu on April 6, 1387 along with Saint- Valery and Ault, however, in Naples at the time, he never learned of his father's death.
He and his wife were poisoned whilst staying at Castel dell' Ovo on July 20, 1387 on the orders of Joanna's own sister Margaret, Queen Regent of Naples.
Robert and Joanna were buried in the church of San Lorenzo Maggiore in Naples.
The marriage of Robert and Joanna had remained childless.
Robert was succeeded in Eu by his younger brother Philip of Artois, Count of Eu.
Louis VIII of France
Louis VIII (5 September 1187 – 8 November 1226), called the Lion , was King of France from 1223 to 1226.
From 1216 to 1217, he also claimed to be King of England.
Louis was the only surviving son of King Philip II of France by his first wife, Isabelle of Hainaut, from whom he inherited the County of Artois.
While Louis VIII only briefly reigned as king of France, he was an active leader prior to accession.
During the First Barons' War of 1215–17 against King John of England, his military prowess earned him the epithet "the Lion".
After his victory at the Siege of Roche-au-Moine in 1214, he invaded southern England and was proclaimed "King of England" by rebellious barons in London on the 2 June 1216.
He was never crowned as king of England, however, and renounced his claim after being excommunicated and repelled.
In 1217, Louis started the conquest of Guyenne, leaving only a small region around Bordeaux to Henry III of England.
Louis's short reign was marked by an intervention using royal forces into the Albigensian Crusade in southern France that decisively moved the conflict towards a conclusion.
He was the first Capetian king to grant appanages to his younger sons on a large scale.
He died in 1226 and was succeeded by his son Louis IX.
Philip of Artois
Philip of Artois( 1269 – 11 September 1298) was the son of Robert II of Artois, Count of Artois, and Amicie de Courtenay.
He was the Lord of Conches, Nonancourt, and Domfront.
He married Blanche of Brittany, daughter of John II, Duke of Brittany, and had the following children:
He served under his father at the Battle of Furnes, where he was wounded.
He never recovered, and died of the effects over a year later.
He was buried in the now- demolished church of the Couvent des Jacobins in Paris.
His premature death led to a legal battle later, when Artois was left to his sister Mahaut rather than his son Robert.

Question: When is Robert I, Count Of Artois's father's birthday?
Answer: 5 September 1187