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.
Bruttia Crispina
Bruttia Crispina (164 – 191 AD) was Roman Empress from 178 to 191 as the consort of Roman Emperor Commodus.
Her marriage to Commodus did not produce an heir, and her husband was instead succeeded by Pertinax.
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.
John Adams (merchant)
John Adams( 1672 or 1673 – 1745) was an American- born Canadian merchant and member of the Nova Scotia Council.
He was the father- in- law of Henry Newton( politician).
John Vernou Bouvier III
John Vernou" Black Jack" Bouvier III( May 19, 1891 – August 3, 1957) was an American Wall Street stockbroker and socialite.
He was the father of First Lady Jacqueline Kennedy Onassis and of socialite Lee Radziwill, and was the father- in- law of John F. Kennedy.
Harry Smith (athlete)
Harry James Smith( July 30, 1888 – November 20, 1962) was an American long- distance runner.
He was most notable for competing in the 1912 Olympics in Stockholm.
He was also the father of Hart wrestling family matriarch Helen Hart and the father- in- law of Stu Hart.
James Armour (Master mason)
James Armour (15 January 1730 – 20 September 1798) was a master mason and father of Jean Armour, and therefore the father-in-law of the poet Robert Burns.
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.
Ogawa Mataji
Viscount was a general in the early Imperial Japanese Army.
He was also the father- in- law of Field Marshal Gen Sugiyama.
Commodus
Commodus (31 August 161 – 31 December 192), born Lucius Aurelius Commodus and died Lucius Aelius Aurelius Commodus, was Roman emperor with his father Marcus Aurelius from 177 until his father's death in 180, and solely until 192.
His reign is commonly considered to mark the end of the golden period in the history of the Roman Empire known as the Pax Romana.
During his father's reign, he accompanied Marcus Aurelius during the Marcomannic Wars in 172 and on a tour of the Eastern provinces in 176.
He was made the youngest consul in Roman history in 177 and later that year elevated to co-emperor with his father.
His accession was the first time a son had succeeded his biological father since Titus succeeded Vespasian in 79.
He was also the first emperor to have both a father and grandfather (who had adopted his father) as the two preceding emperors.
Commodus was the first (and until 337, the only) emperor "born in the purple", meaning during his father's reign.
During his solo reign, the Empire enjoyed a period of reduced military conflict compared with the reign of Marcus Aurelius, but intrigues and conspiracies abounded, leading Commodus to an increasingly dictatorial style of leadership that culminated in a god-like personality cult.
His assassination in 192 marked the end of the Nerva–Antonine dynasty.
He was succeeded by Pertinax, the first emperor in the tumultuous Year of the Five Emperors.

Question: Who is Bruttia Crispina's father-in-law?
Answer: Marcus Aurelius