Louis Jean Marie de Bourbon, Duke of Penthièvre
Louis Jean Marie de Bourbon (16 November 1725 – 4 March 1793) was the son of Louis Alexandre de Bourbon and his wife Marie Victoire de Noailles.
He was also a grandson of Louis XIV of France and his mistress, Madame de Montespan.
From birth he was known as the Duke of Penthièvre.
He also possessed the following titles: Prince of Lamballe (given later as a courtesy title to the duke's only surviving son); Prince of Carignano; Duke of Rambouillet; Duke of Aumale (1775); Duke of Gisors; Duke of Châteauvillain; Duke of Arc-en-Barrois; Duke of Amboise; Count of Eu; Count of Guingamp.
He was the father in law of "Philippe Égalité".
George of Naples
George( date of birth unknown; died 739) was the Duke of Naples for a decade beginning in 729.
Stephen of Aumale
Stephen of Aumale( – 1127) was Count of Aumale from before 1089 to 1127, and Lord of Holderness.
John I, Count of Aumale
John I of Ponthieu(? – Kortrijk, County of Flanders, Kingdom of France, July 11, 1302) was Count of Aumale.
He was son of Ferdinand II, Count of Aumale, and Laura of Montfort.
After the death of his father in 1260, he became co-ruler in the County of Aumale with his grandmother Joan.
They reigned together until her death in 1279.
John married Ida of Meulan, and had a son John II( 1293 – 1343), who succeeded him.
John fought as a knight in the French army against the Flemish in the Battle of the Golden Spurs on July 11, 1302 near Kortrijk, and was one of the many nobles killed in the battle.
Theodred II (Bishop of Elmham)
Theodred II was a medieval Bishop of Elmham.
The date of Theodred's consecration unknown, but the date of his death was sometime between 995 and 997.
Hawise, Countess of Aumale
Hawise, Countess of Aumale( died 11 March 1214) was ruling Countess of Aumale from 1179 until 1194 with her husbands.
She was the daughter and heiress of William, Count of Aumale and Cicely, daughter and co-heiress of William fitz Duncan.
She became Countess of Essex by her marriage to William de Mandeville, 3rd Earl of Essex.
Włodzisław, Duke of Lendians
Włodzisław or Władysław( date of birth unknown – died after 944/945) was a Duke of Lendians.
Maria Amalia of Naples and Sicily
Maria Amalia of Naples and Sicily (Maria Amalia Teresa; 26 April 1782 – 24 March 1866) was a French queen by marriage to Louis Philippe I, King of the French.
Henri d'Orléans, Duke of Aumale
"Henri" Eugène Philippe Louis d'Orléans, Duke of Aumale (16 January 1822 – 7 May 1897) was a leader of the Orleanists, a political faction in 19th-century France associated with constitutional monarchy.
He was born in Paris, the fifth son of King Louis-Philippe I of the French and Maria Amalia of Naples and Sicily.
He used the title Duke of Aumale.
He retired from public life in 1883.
Prince Louis, Duke of Nemours
Prince Louis of Orleans, Duke of Nemours( Louis Charles Philippe Raphaël d' Orléans; 25 October 1814 – 26 June 1896) was the second son of King Louis- Philippe I of France, and his wife Maria Amalia of Naples and Sicily.

Question: What is the date of birth of Henri D'Orléans, Duke Of Aumale's mother?
Answer: 26 April 1782