Question: Who is the paternal grandfather of Princess Anne Of Orléans?

Knowledge 1: Princess Anne of Orléans
Princess Anne of Orléans ("Anne Hélène Marie";5 August 1906, Le Nouvion-en-Thiérache, Aisne – 19 March 1986, Sorrento) was a member of the House of Orléans and the Duchess of Aosta by marriage.She was the daughter of Prince Jean, Duke of Guise and Princess Isabelle of Orléans. [SEP] Knowledge 2: Prince Jean, Duke of Guise
Prince Jean of Orléans, Duke of Guise(Jean Pierre Clément Marie; 4 September 1874 – 25 August 1940), was the third son and youngest child of Prince Robert, Duke of Chartres (1840–1910), grandson of Prince Ferdinand Philippe and great-grandson of Louis Philippe I, King of the French.His mother was Françoise of Orléans, daughter of François, Prince of Joinville, and Princess Francisca of Brazil.
Knowledge 1: Princess Anne of Orléans
Princess Anne of Orléans ("Anne Hélène Marie";5 August 1906, Le Nouvion-en-Thiérache, Aisne – 19 March 1986, Sorrento) was a member of the House of Orléans and the Duchess of Aosta by marriage.She was the daughter of Prince Jean, Duke of Guise and Princess Isabelle of Orléans. [SEP] Knowledge 2: Prince Jacques, Duke of Orléans
Prince Jacques of Orléans, Duke of Orléans," fils de France"( Jacques Jean Jaroslaw Marie; born 25 June 1941 in Rabat, Morocco), is the son of Henri, Count of Paris( the Orléanist claimant to the French throne from 1940 until his death) and his wife, Princess Isabelle of Orléans- Braganza.
Knowledge 1: Princess Anne of Orléans
Princess Anne of Orléans ("Anne Hélène Marie";5 August 1906, Le Nouvion-en-Thiérache, Aisne – 19 March 1986, Sorrento) was a member of the House of Orléans and the Duchess of Aosta by marriage.She was the daughter of Prince Jean, Duke of Guise and Princess Isabelle of Orléans. [SEP] Knowledge 2: Philippe I, Duke of Orléans
Philippe, Duke of Orléans( 21 September 1640 – 9 June 1701) was the younger son of Louis XIII of France and his wife, Anne of Austria.His older brother was the famous" Sun King", Louis XIV.Styled Duke of Anjou from birth, Philippe became Duke of Orléans upon the death of his uncle Gaston in 1660.In 1661, Philippe also received the dukedoms of Valois and Chartres.Following Philippe's victory in battle in 1671, Louis XIV added the dukedom of Nemours, the marquisates of Coucy and Folembray, and the countships of Dourdan and Romorantin.During the reign of his brother he was known simply as" Monsieur", the traditional style at the court of France for the younger brother of the king.Although he was open about his homosexual behaviour and freely acted effeminately, he married twice and fathered several children.He was the founder of the House of Orléans, a cadet branch of the ruling House of Bourbon, and thus the direct ancestor of Louis Philippe I, who ruled France from 1830 until 1848 in the July Monarchy.Through the children of his two marriages, Philippe became an ancestor of most modern- day Roman Catholic royalty, giving him the nickname of" the grandfather of Europe".He was also military commander at the Battle of Cassel in 1677.Through careful personal administration, Philippe greatly augmented the fortunes of the House of Orléans.

Answer: Prince Robert, Duke of Chartres