Question: Who is the father-in-law of Maria Komnene (Daughter Of Alexios I)?

Knowledge 1: Maria Komnene (daughter of Alexios I)
Maria Komnene (19 September 1085 – after 1136) was the second daughter of the Byzantine emperor Alexios I Komnenos.She was initially betrothed to Gregory Gabras, but married to Nikephoros Katakalon. [SEP] Knowledge 2: Nikephoros Katakalon
Nikephoros Euphorbenos Katakalon  was a Byzantine aristocrat and son-in-law of Emperor Alexios I Komnenos .He was the son of the distinguished general Constantine Euphorbenos Katakalon, one of Alexios' most trusted officials.As a token of Alexios' appreciation for Constantine, Nikephoros was married to the "porphyrogennete" Maria, the emperor's second daughter, and raised to the rank of "panhypersebastos".From the "Alexiad", he is known to have participated in combat against the Cumans in 1095, alongside his father, where he distinguished himself by his bravery.It is unknown when he died, but he is recorded as being dead by 1130.With Maria, he had numerous children, but only two sons, Alexios Komnenos and Andronikos, are known by name, having held senior positions later in the century.Another son, John, is known only by his commemoration in the "typikon" of the Monastery of Christ Philanthropos.The couple also had an unknown number of daughters (at least three according to Varzos), as their existence is mentioned in the "typikon" of the Kecharitomene Monastery.
Knowledge 1: Maria Komnene (daughter of Alexios I)
Maria Komnene (19 September 1085 – after 1136) was the second daughter of the Byzantine emperor Alexios I Komnenos.She was initially betrothed to Gregory Gabras, but married to Nikephoros Katakalon. [SEP] Knowledge 2: 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.
Knowledge 1: Maria Komnene (daughter of Alexios I)
Maria Komnene (19 September 1085 – after 1136) was the second daughter of the Byzantine emperor Alexios I Komnenos.She was initially betrothed to Gregory Gabras, but married to Nikephoros Katakalon. [SEP] Knowledge 2: Ogawa Mataji
Viscount was a general in the early Imperial Japanese Army.He was also the father- in- law of Field Marshal Gen Sugiyama.

Answer: Constantine Euphorbenos Katakalon