Question: Andrzej Zebrzydowski served as chaplain for which powerful member of the house that ruled the Duchy of Milan?

Context paragraphs:
Andries de Graeff: Free Imperial Knight Andries de Graeff (19 February 1611 – 30 November 1678) was a very powerful member of the Amsterdam branch of the De Graeff - family during the Dutch Golden Age.  He became a mayor of Amsterdam and a powerful Amsterdam regent after the death of his older brother Cornelis de Graeff.  Like him and their father Jacob Dircksz de Graeff he opposed the house of Orange.  In the mid-17th century he controlled the finances and politics.

Andrzej Zebrzydowski: Andrzej Zebrzydowski, (1496 in Więcbork – 23 May 1560 in Września), Radwan coat of arms, was a Polish Roman Catholic bishop of Kamieniec Podolski (from 1543), Chełm (from 1545), Włocławek (from 1546) and Kraków (from 25 February 1551); chaplain of Bona Sforza, then supporter of Sigismund II Augustus.

Angelo La Barbera: Angelo La Barbera (July 3, 1924 – October 28, 1975) was a powerful member of the Sicilian Mafia.  Together with his brother Salvatore La Barbera (Palermo, April 20, 1922 – January 17, 1963) he ruled the Mafia family of Palermo Centro.  Salvatore La Barbera sat on the first Sicilian Mafia Commission that was set up in 1958 as the capo mandamento for Mafia families of Borgo Vecchio, Porta Nuova and Palermo Centro.

Virginia House of Delegates: The Virginia House of Delegates is one of two parts in the Virginia General Assembly, the other being the Senate of Virginia.  It has 100 members elected for terms of two years; unlike most states, these elections take place during odd-numbered years.  The House is presided over by the Speaker of the House, who is elected from among the House membership by the Delegates.  The Speaker is usually a member of the majority party and, as Speaker, becomes the most powerful member of the House.  The House shares legislative power with the Senate of Virginia, the upper house of the Virginia General Assembly.  The House of Delegates is the modern-day successor to the Virginia House of Burgesses, which first met at Jamestown in 1619.  The House is divided into Democratic and Republican caucuses.  In addition to the Speaker, there is a majority leader, majority caucus chair, minority leader, minority caucus chair, and the chairs of the several committees of the House.

Pragmatic Sanction of 1713: The Pragmatic Sanction (Latin: "Sanctio Pragmatica" ) was an edict issued by Charles VI on 19 April 1713, to ensure that the Habsburg hereditary possessions could be inherited by a daughter.  The Head of the House of Habsburg ruled the Archduchy of Austria, the Kingdom of Hungary, the Kingdom of Croatia, the Kingdom of Bohemia, the Italian territories awarded to Austria by the Treaty of Utrecht (Duchy of Milan, Kingdom of Naples and Kingdom of Sicily), and the Austrian Netherlands.  The Pragmatic Sanction did not affect the office of Holy Roman Emperor because the Imperial crown was elective, not hereditary, even though successive elected Habsburg rulers headed the Holy Roman Empire since 1438.

Stephen Hagiochristophorites: Stephen Hagiochristophorites (Greek: Στέφανος Ἁγιοχριστοφορίτης , "Stephanos Hagiochristophorites"; ca. 1130 – 11 September 1185) was the most powerful member of the court of Byzantine emperor Andronikos I Komnenos (ruled 1182–85), and was killed by Isaac II Angelos, who the next day deposed and replaced Andronikos, while trying to arrest him.

Bona Sforza: Bona Sforza (2 February 1494 – 19 November 1557) was a member of the powerful House of Sforza, which ruled the Duchy of Milan since 1447.  In 1518, she became the second wife of Sigismund I the Old, the King of Poland and Grand Duke of Lithuania.  Their marriage lasted 30 years until Sigismund's death in 1548.  Ambitious and energetic, Bona became heavily involved in the political life of Poland–Lithuania.  To increase state revenue, she implemented various economic and agricultural reforms, including the far-reaching Wallach Reform in the Grand Duchy of Lithuania.  Her reforms made her the richest landowner in the Grand Duchy.  In foreign policy, she opposed the Habsburgs and sought to secure her eldest daughter Isabella Jagiellon in the Kingdom of Hungary.

Map of Juan de la Cosa: The map or chart of Juan de la Cosa is a mappa mundi painted on parchment, 93 cm high and 183 cm wide.  Since the nineteenth century it has formed part of the collections of the Naval Museum of Madrid (Spain).  A line of text on the map says it was made by the Cantabrian cartographer and sailor Juan de la Cosa in 1500 in the Andalusian port city of Puerto de Santa María.  Its rich decoration hints that it was ordered by some powerful member of the court of the Catholic Monarchs, who ruled the kingdoms of Castile and Aragon at that time.

List of governors of the Duchy of Milan: The Governor of Milan ruled the Duchy of Milan as a representative of the King of Spain (1535–1706) and the Archduke of Austria (1706–1796) and (1799–1800).  The first governor was appointed after the death of the last duke of the House of Sforza, Francesco II.

Jan Bernd Bicker: Jan Bernd Bicker (27 August 1746, Amsterdam – 16 December 1812, Wassenaar) was a Dutch merchant, politician and a very powerful member of the Bicker family.  After studying law and philosophy at the University of Amsterdam, he settled in Amsterdam and became a successful merchant.  He served as an alderman of Amsterdam and as an administrator of the Amsterdam branch of the Dutch West India Company (W.I.C.).

Supporting paragraphs: Andrzej Zebrzydowski Bona Sforza
Answer: Bona Sforza