Question: Who is the father-in-law of Helena Palaiologina, Despotess Of Serbia?

Knowledge 1: Helena Palaiologina, Despotess of Serbia
Helena Palaiologina (1431 – 7 November 1473) was a Byzantine princess who married Serbian Despot Lazar Branković, who ruled from 1456 until his death in 1458.After Smederevo fell to the Ottoman Turks on 20 June 1459, she fled Serbia for the Greek island of Leukas, where she converted to Catholicism.She later became a nun, assuming the name of Hypomone (Хипомона,υπομονή meaning "patience" in Greek). [SEP] Knowledge 2: Lazar Branković
Lazar Branković (c. 1421 – 20 February 1458) was a Serbian despot, prince of Rascia from 1456 to 1458.He was the third son of Đurađ Branković and his wife Eirene Kantakouzene.He was succeeded by his elder brother, despot Stefan III Branković.
Knowledge 1: Helena Palaiologina, Despotess of Serbia
Helena Palaiologina (1431 – 7 November 1473) was a Byzantine princess who married Serbian Despot Lazar Branković, who ruled from 1456 until his death in 1458.After Smederevo fell to the Ottoman Turks on 20 June 1459, she fled Serbia for the Greek island of Leukas, where she converted to Catholicism.She later became a nun, assuming the name of Hypomone (Хипомона,υπομονή meaning "patience" in Greek). [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: Helena Palaiologina, Despotess of Serbia
Helena Palaiologina (1431 – 7 November 1473) was a Byzantine princess who married Serbian Despot Lazar Branković, who ruled from 1456 until his death in 1458.After Smederevo fell to the Ottoman Turks on 20 June 1459, she fled Serbia for the Greek island of Leukas, where she converted to Catholicism.She later became a nun, assuming the name of Hypomone (Хипомона,υπομονή meaning "patience" in Greek). [SEP] Knowledge 2: Peter Bua
Peter Bua( or Peter Boua; fl. 1450s) was an Albanian nobleman of the late medieval Despotate of the Morea( Peloponnese) who was the chief instigator of the Morea revolt of 1453 – 1454.After the revolt, he was recognized by the Ottoman Empire as the official representative of the Albanians of the Morea.

Answer: Đurađ Branković