Henri, Duke of Montpensier
Henri de Bourbon, Duke of Montpensier, (12 May 1573 – 27 February 1608) was Dauphin of Auvergne, Duke of Montpensier, Sovereign Prince of the Dombes and Lord of Châtellerault.
Henri was born at Mézières, the son of François de Bourbon, Duke of Montpensier, and of his wife Renée d'Anjou, "marquise de Mézières".
On 15 May 1597, Henri married Henriette Catherine, daughter of Henri de Joyeuse and Catherine de Nogaret.
They had one child:
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".
Louise Marie Adélaïde de Bourbon, Duchess of Orléans
Louise Marie Adélaïde de Bourbon- Penthièvre, Duchess of Orléans( 13 March 1753 – 23 June 1821), was the daughter of Louis Jean Marie de Bourbon, Duke of Penthièvre and of Princess Maria Theresa Felicitas of Modena.
At the death of her brother, Louis Alexandre de Bourbon- Penthièvre," prince de Lamballe", she became the wealthiest heiress in France prior to the French Revolution.
She married Louis Philippe II, Duke of Orléans, the" regicidePhilippe Égalité", and was the mother of France's last king, Louis Philippe I, King of the French.
She was sister- in- law to" the princesse de Lamballe", and was the last member of the" Bourbon- Penthièvre" family.
Louis Alexandre, Prince of Lamballe
Louis Alexandre de Bourbon( Louis Alexandre Joseph Stanislas; 6 September 1747 – 6 May 1768) was the son and heir of Louis Jean Marie de Bourbon, grandson of Louis XIV by the king's legitimised son, Louis Alexandre de Bourbon.
He was known as the" Prince of Lamballe" from birth.
He pre-deceased his father, and died childless.
François, Duke of Montpensier
François de Bourbon( 1542 – 4 June 1592) was the Duke of Montpensier and member of the House of Bourbon.
He was the brother of Charlotte de Bourbon, Princess of Orange and wife of William the Silent," Prince of Orange".
He was the great grandfather of" La Grande Mademoiselle" cousin of Louis XIV.
Marie Victoire de Noailles
"Marie Victoire" Sophie de Noailles, Countess of Toulouse
(Versailles, 6 May 1688 – Paris, 30 September 1766), was a French noble and courtier.
She was the daughter of Anne Jules de Noailles, the 2nd Duke of Noailles, and Marie-Françoise de Bournonville.
Her second spouse was Louis Alexandre de Bourbon, Count of Toulouse, the youngest legitimized son of King Louis XIV of France and his maîtresse-en-titre, Madame de Montespan.
Jean-Baptiste Charpentier the Elder
Jean- Baptiste Charpentier the Elder( 1728, Paris- 3 December 1806, Paris) was a French Rococo portrait painter, associated with the Royal Court.
He is best known for portraits of Marie- Antoinette and Louis Jean Marie de Bourbon, Duke of Penthièvre.
He also painted members of the Duke's family.
His early works were mostly genre scenes.
Marie de Bourbon, Duchess of Montpensier
Marie de Bourbon( 15 October 1605 – 4 June 1627), Duchess of Montpensier, and Duchess of Orléans by marriage, was a French noblewoman and one of the last members of the House of Bourbon- Montpensier.
Her parents were Henri de Bourbon," Duke of Montpensier" and Henriette Catherine de Joyeuse, Duchess of Joyeuse in her own right.
Vincent de Bourbon, Count of Guingamp
Vincent de Bourbon, Count of Guingamp
( Vincent Marie Louis; 22 June 1750 – 14 March 1752) was a son of Louis Jean Marie de Bourbon, Duke of Penthièvre and died before his second birthday.
Fourth child born to Louis Jean Marie de Bourbon, Duke of Penthièvre, by his wife, Maria Teresa d' Este.
His only brother to survive childhood was' Louis Alexandre, Prince of Lamballe.
Vincent died at the Palace of Versailles in his mother's suite of rooms there, Years after his death his posthumous sister, Louise Marie Adélaïde de Bourbon moved his remains to the Royal Chapel of Dreux.
Jean Marie, Duke of Châteauvillain
Jean Marie de Bourbon, Duke of Châteauvillain( 17 July 1748 – 19 May 1755) was a French Duke and nobleman.
He died in Paris at the age of 6.
He was the" duc de Châteauvillain" from birth.

Question: Who is the maternal grandfather of Louis Jean Marie De Bourbon, Duke Of Penthièvre?
Answer: Anne Jules de Noailles