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).
Ogawa Mataji
Viscount was a general in the early Imperial Japanese Army.
He was also the father- in- law of Field Marshal Gen Sugiyama.
Peter II of Cyprus
Peter II (1354 or 1357 – 13 October 1382), called the Fat (French "Pierre le Gros"), was the eleventh King of Cyprus of the House of Lusignan from 17 January 1369 until his death.
He was the son of Peter I of Cyprus and Eleanor of Aragon.
He succeeded to the throne while he was still underage, following the assassination of his father in 1369.
He was also titular Count of Tripoli and King of Jerusalem.
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.
James III of Cyprus
James III of Cyprus( or Jacques III de Lusignan)( 6 July 1473 – 26 August 1474) was the only child by the marriage of James II of Cyprus and Catherine Cornaro.
He died in mysterious circumstances as an infant, leaving his mother as the last Queen of Cyprus.
His death paved the way for Venice to gain control of Cyprus.
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.
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.
Isabella of Ibelin, Queen of Cyprus and Jerusalem
Isabella of Ibelin( 1241–1324), was Queen of Cyprus and Jerusalem by marriage to Hugh III of Cyprus.
She was the daughter of Guy d' Ibelin, marshal and constable of the Kingdom of Cyprus, and of Philippa Berlais.
She married Hugh III of Cyprus( 1235 – 1284), the King of Cyprus( reign 1267 – 1284).
Valentina Visconti, Queen of Cyprus
Valentina Visconti (1360/62 – 1393) was Queen consort of Cyprus and titular Queen consort of Jerusalem by marriage to Peter II of Cyprus.
She was the daughter of Bernabò Visconti and his wife Beatrice Regina della Scala.
Catherine Cornaro
Catherine Cornaro( 25 November 1454 – 10 July 1510) was the last monarch of the Kingdom of Cyprus.
She was queen consort of Cyprus by marriage to James II of Cyprus, regent of Cyprus during the minority of her son James III of Cyprus in 1473 – 1474, and finally queen regnant of Cyprus.
She reigned from 26 August 1474 to 26 February 1489 and was declared a" Daughter of Saint Mark" in order that the Republic of Venice could claim control of Cyprus after the death of her husband, James II.

Question: Who is the father-in-law of Valentina Visconti, Queen Of Cyprus?
Answer: Peter I of Cyprus