Jean Pierre Clément Marie d'Orléans, Duke of Guise (4 September 1874 – 25 August 1940), was the son of Robert, Duke of Chartres

Robert, Duke of Chartres

Prince Robert Philippe Louis Eugène Ferdinand of Orléans, Duke of Chartres was the son of Prince Ferdinand Philippe, Duke of Orléans and thus grandson of King Louis-Philippe of France. He fought for the Union in the American Civil War, and then for France in the 1870 Franco-Prussian War...

 (1840–1910), grandson of Ferdinand-Philippe and great-grandson of Louis Philippe I

Louis-Philippe of France

Louis Philippe I was King of the French from 1830 to 1848 in what was known as the July Monarchy. His father was a duke who supported the French Revolution but was nevertheless guillotined. Louis Philippe fled France as a young man and spent 21 years in exile, including considerable time in the...

, King of the French. His mother was Marie-Françoise d'Orléans, daughter of François, Prince of Joinville, and Francisca of Braganza, Princess of Brazil

Prince Imperial of Brazil

Prince Imperial of Brazil is the title created after the proclamation of independence of the Empire of Brazil, in 1822, to designate the heir apparent to the Brazilian imperial throne...

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Biography

Upon the death of his cousin Philippe of Orléans, Duke of Orléans, claimant to the throne of France as "Philip VIII", the Duke of Guise became, at least for his Orleanist

Orléanist

The Orléanists were a French right-wing/center-right party which arose out of the French Revolution. It governed France 1830-1848 in the "July Monarchy" of king Louis Philippe. It is generally seen as a transitional period dominated by the bourgeoisie and the conservative Orleanist doctrine in...

 supporters, titular king of France as "Jean III". The title was disputed by members of the Spanish Anjou branch of the family, descended from Louis XIV

Louis XIV of France

Louis XIV , known as Louis the Great or the Sun King , was a Bourbon monarch who ruled as King of France and Navarre. His reign, from 1643 to his death in 1715, began at the age of four and lasted seventy-two years, three months, and eighteen days...

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Marriage and issue

In 1899, Jean d'Orléans married his 1st cousin Isabelle d'Orléans

Isabelle d'Orléans, duchesse de Guise

Princess Isabelle of Orléans was a member of the French Orleanist royal family and by marriage Duchess of Guise....

 (1878–1961). Isabelle was the younger sister of Philip VIII and daughter of Philip VII

Philippe, Comte de Paris

Philippe d'Orléans, Count of Paris was the grandson of Louis Philippe I, King of the French. He was a claimant to the French throne from 1848 until his death.-Early life:...

 and Marie Isabelle d'Orléans

Princess Marie Isabelle of Orléans

Marie Isabelle of Orléans was born an infanta of Spain and Princess of Orléans and was a Princess of Orléans and Countess of Paris by marriage.-Biography:She was born in Seville to Antoine d'Orléans and Infanta...

.

They had four children:

• Isabelle d'Orléans (1900–1983). First married in 1923 to Marie Hervé Jean Bruno, Count of Harcourt
  Bruno, Count of Harcourt
  Marie Hervé Jean Bruno d'Harcourt, Count of Harcourt was a member of the French nobility and a Grand Prix motor racing driver....
  
   (1899–1930) and then to Pierre Murat, Prince Murat in 1934.
• Françoise d'Orléans
  Princess Françoise of Orléans (1902–1953)
  Princess Françoise of Orléans was born a Princess of Orléans and was a Princess of Greece and Denmark by marriage. She was thus a member of the Greek royal family...
  
   (1902–1953). Married to Christopher of Greece and Denmark in 1929. He was a son of George I of Greece
  George I of Greece
  George I was King of Greece from 1863 to 1913. Originally a Danish prince, George was only 17 years old when he was elected king by the Greek National Assembly, which had deposed the former king Otto. His nomination was both suggested and supported by the Great Powers...
  
   and Olga, Queen of Greece. They were parents of Prince Michael of Greece and Denmark.
• Anne d'Orléans (1906–1986). She married Amedeo, 3rd Duke of Aosta
  Amedeo, 3rd Duke of Aosta
  Prince Amedeo of Savoy-Aosta was the third Duke of Aosta and a first cousin, once removed of the King of Italy, Victor Emmanuel III. His baptismal name was Amedeo Umberto Isabella Luigi Filippo Maria Giuseppe Giovanni di Savoia-Aosta...
  
   in 1927.
• Henri d'Orléans, Count of Paris (1908–1999).

Jean died in Larache, Morocco, in 1940.

Ancestry