Question: Jerzy Ilicz was the Polish ambassador to Safavid Iran during the reign of king Władysław IV Vasa (r. 1632—1648), was a Polish prince from which organization?
Context: The Siege of Belaya was the final military episode of the Smolensk War.  The heroic defense of the fortress by its small Russian garrison against a large Polish-Lithuanian army of King Władysław IV Vasa thwarted the king's plan to march against Moscow and made him sign the Treaty of Polyanovka in which he relinquished his claims to the Russian throne. Jerzy Ilicz was the Polish ambassador to Safavid Iran during the reign of king Władysław IV Vasa (r. 1632—1648).  He was accompanied by the Dominican Father Antonio da Fiandra, who was given a letter addressed to the then incumbent Safavid king Abbas II (r. 1642—1666) by the Venetian diplomat Giovanni Tiepolo, on behalf of the Venetian Senate. John II Casimir (Polish: "Jan II Kazimierz Waza" ; German: "Johann II.  Kasimir Wasa" ; Lithuanian: "Jonas Kazimieras Vaza" ; 22 March 1609 – 16 December 1672) was King of Poland and Grand Duke of Lithuania during the era of the Polish–Lithuanian Commonwealth, Duke of Opole in Upper Silesia, and titular King of Sweden 1648–1660.  In Poland, he is known and commonly referred as Jan Kazimierz.  His parents were Sigismund III Vasa (1566–1632) and Constance of Austria (1588–1631).  His older brother, and predecessor on the throne, was Władysław IV Vasa. Adam Kazanowski (c. 1599 – 25 December, 1649) was a noble of the Polish-Lithuanian Commonwealth from 1633, Greater Crown Stolnik from 1634, Court Chamberlain ("podkomorzy koronny") and castellan of Sandomierz from 1637, Court Marshall from 1643, żupnik of Wieliczka from 1642, starosta barcicki, borysowski, kozienicki, rumieński, solecki, nowotarski, warecki, bielski and a close and influential friend of King Władysław IV Vasa. Jadwiga Łuszkowska (about 1616 in Lviv – after 20 May 1648 in Merecz) was a Polish noble lady and mistress of Polish king Władysław IV Vasa.  She was the daughter of merchant Jan Łuszkowski (died 1627) and Anna (died after 1635). Kodak fortress (Ukrainian: Кодак ; Polish: "Kudak" ) was a fort built in 1635 by the order of the Polish king Władysław IV Vasa and the Sejm on the Dnieper River near what would become the town of Stari Kodaky (now near the city of Dnipropetrovsk in Ukraine.  In 1711 according to the Treaty of the Pruth the fortress was destroyed by the Muscovites. Władysław IV Vasa (Polish: "Władysław IV Waza" ; Russian: Владислав IV Ваза , "Vladislav IV Vaza" ; Latin: "Vladislaus IV Vasa" or "Ladislaus IV Vasa"; Lithuanian: "Vladislovas Vaza" ; 9 June 1595 – 20 May 1648) was a Polish prince from the Royal House of Vasa.  He reigned as King of Poland and Grand Duke of Lithuania from 8 November 1632 to his death in 1648. Archduchess Cecilia Renata of Austria (German: "Cäcilia Renata"; Polish: "Cecylia Renata"; 16 July 1611 – 24 March 1644) was Queen of Poland as consort to the Polish-Lithuanian Commonwealth's King Władysław IV Vasa. Ludvig (Lodewyck) Fabritius (born 14 September 1648, Brazil — d. 6 October 1729, Stockholm) was the Swedish ambassador to Safavid Iran during the reign of the kings Charles XI (r. 1660–1697) and Charles XII (r. 1697–1718).  After an initial career in the Russian army, he pursued a diplomatic career representing the Swedish crown.  He led three missions to the Safavid court, in 1679-80, 1683–84, and 1697-1700.  His efforts were mainly characterized by the aimed establishment of a new transit route between Sweden and Iran through Russia with Narva as its main hub, as well as several attempts to establish a fruitful alliance against the common enemy, namely the Ottoman Empire.  Throughout his tenure as ambassador to the Safavid court, a formal invititation to the Safavid king on behalf of the Swedish king to join the Holy League was made as well, apart from several successful Safavid-Swedish economic and trade-related agreements. Aaron Markovich of Wilna was an agent (court Jew) of King Władysław IV Vasa of Poland in the 17th century.
Answer: Royal House of Vasa