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".
Peter Burroughs
Peter Burroughs( born 27 January 1947) is a British television and film actor, the director of Willow Management.
He is the father- in- law of actor and TV presenter Warwick Davis.
William X, Duke of Aquitaine
William X (Guillém X in Occitan) (1099 – 9 April 1137), called the Saint, was Duke of Aquitaine, Duke of Gascony, and Count of Poitou (as William VIII) from 1126 to 1137.
He was the son of William IX by his second wife, Philippa of Toulouse.
William was born in Toulouse during the brief period when his parents ruled the capital.
His birth is recorded in the "Chronicle of Saint-Maixent" for the year 1099:
"Willelmo comiti natus est filius, equivoce Guillelmus vocatusa son was born to Count William, named William like himself").
Later that same year, much to Philippa's ire, Duke William IX mortgaged Toulouse to Philippa's cousin, Bertrand of Toulouse, and then left on Crusade.
Philippa and her infant son William X were left in Poitiers.
When Duke William IX returned from his unsuccessful crusade, he took up with Dangerose, the wife of a vassal, and set aside his rightful wife, Philippa.
This caused strain between father and son, until 1121 when William X married Aenor de Châtellerault, a daughter of his father's mistress Dangerose by her first husband, Aimery.
William had three children with Aenor:
He possibly had one natural son, William.
For a long time it was thought that he had another natural son called Joscelin and some biographies still erroneously state this fact, but Joscelin has been shown to be the brother of Adeliza of Louvain.
The attribution of Joscelin as a son of William X has been caused by a mistaken reading of the Pipe Rolls pertaining to the reign of Henry II, where 'brother of the queen' has been taken as Queen Eleanor, when the queen in question is actually Adeliza of Louvain.
William administered his Aquitaine duchy as both a lover of the arts and a warrior.
He became involved in conflicts with Normandy (which he raided in 1136, in alliance with Geoffrey V, Count of Anjou who claimed it in his wife's name) and for France.
Even inside his borders, William faced an alliance of the Lusignans and the Parthenays against him, an issue resolved with total destruction of the enemies.
In international politics, William X initially supported antipope Anacletus II in the papal schism of 1130, opposite to Pope Innocent II, against the will of his own bishops.
In 1134 Saint Bernard of Clairvaux convinced William to drop his support to Anacletus and join Innocent.
In 1137 William joined the pilgrimage to Santiago de Compostela, but died during the trip.
On his deathbed, he expressed his wish to see king Louis VI of France as protector of his fifteen-year-old daughter Eleanor, and to find her a suitable husband.
Louis VI naturally accepted this guardianship and married the heiress of Aquitaine to his own son, Louis VII.
John of Salisbury's Memoirs of the Papal Court translated from the Latin with introduction and notes by Marjorie Chibnall
Bill Dundee
William" Bill" Cruickshanks( born 24 October 1943) is a Scottish born- Australian professional wrestler and author better known by his stage name Bill Dundee.
Cruickshanks is the father of Jamie Dundee and the father- in- law of wrestler Bobby Eaton.
Aénor de Châtellerault
Aénor of Châtellerault (also known as "Aénor de Rochefoucauld")
Duchess of Aquitaine (born c. 1103 in Châtellerault, died March 1130 in Talmont) was the mother of Eleanor of Aquitaine, who arguably became the most powerful woman in Europe of her generation.
Aenor was a daughter of Viscount Aimery I, Viscount of Châtellerault and his wife, Dangereuse de L' Isle Bouchard (d. 1151).
Her mother was willingly "abducted" by her future father-in-law, William IX of Aquitaine and became his mistress until his death in 1127.
Aenor married William X of Aquitaine, the son of her mother's lover, in 1121 and had three children with him:
Ludwig von Westphalen
Johann Ludwig von Westphalen( 11 July 1770 – 3 March 1842) was a liberal Prussian civil servant and the father- in- law of Karl Marx.
Emma of Blois
Emma of Blois( 950–27 December 1003) was Duchess consort of Aquitaine by marriage to William IV, Duke of Aquitaine.
She ruled Aquitaine as regent for her son, William V, Duke of Aquitaine, from 996 until 1004.
Barthold A. Butenschøn Sr.
Hans Barthold Andresen Butenschøn( 27 December 1877 – 28 November 1971) was a Norwegian businessperson.
He was born in Kristiania as a son of Nils August Andresen Butenschøn and Hanna Butenschøn, and grandson of Nicolay Andresen.
Together with Mabel Anette Plahte( 1877 – 1973, a daughter of Frithjof M. Plahte) he had the son Hans Barthold Andresen Butenschøn Jr. and was through him the father- in- law of Ragnhild Butenschøn and grandfather of Peter Butenschøn.
Through his daughter Marie Claudine he was the father- in- law of Joakim Lehmkuhl, through his daughter Mabel Anette he was the father- in- law of Harald Astrup( a son of Sigurd Astrup) and through his daughter Nini Augusta he was the father- in- law of Ernst Torp.
He took commerce school and agricultural school.
He was hired in the family company N. A. Andresen& Co, and became a co-owner in 1910.
He eventually became chief executive officer.
The bank changed its name to Andresens Bank in 1913 and merged with Bergens Kreditbank in 1920.
The merger was dissolved later in the 1920s.
He was also a landowner, owning Nedre Skøyen farm and a lot of land in Enebakk.
He chaired the board of Nydalens Compagnie from 1926, having not been a board member before that.
He also chaired the supervisory council of Forsikringsselskapet Viking and Nedre Glommen salgsforening, and was a supervisory council member of Filharmonisk Selskap.
He was a member of the gentlemen's club SK Fram since 1890, and was proclaimed a lifetime member in 1964.
He was buried in Enebakk.
Prince William Frederick, Duke of Gloucester and Edinburgh
Prince William, Duke of Gloucester and Edinburgh,( William Frederick; 15 January 1776 – 30 November 1834) was a great- grandson of King George II and nephew and son-in- law of King George III of the United Kingdom.
Ogawa Mataji
Viscount was a general in the early Imperial Japanese Army.
He was also the father- in- law of Field Marshal Gen Sugiyama.

Question: Who is the father-in-law of William X, Duke Of Aquitaine?
Answer: Aimery I, Viscount of Châtellerault