(Translated by https://www.hiragana.jp/)
Jan Kostka - Wikipedia

Jan Kostka (ca. 1529–1581) was a Polish noble and a candidate in elections for the new King of Poland in 1572. He was also an advisor to Kings Henry of Valois and Stefan Batory.

Jan Kostka
Coat of arms
Dąbrowa
Bornca. 1529
Sztemberk v. Stążków
Died(1581-05-31)May 31, 1581
Jarosław
FamilyKostka
ConsortJadwiga Przerębska
Zofia Odrowąż
Issuewith 1555 Jadwiga Przerębska
Stanisław Wojciech Kostka
Jan Kostka
Jadwiga Konopacka
Elzbieta Róza-Zalińska
Anna Tomicka
with 1569 Zofia Odrowąż
Jan Kostka
Anna Magdalena Kostka
Anna Kostka
Katarzyna Sieniawska
FatherStanisław Kostka
MotherElżbieta z Eilemberku

He was a courtier and a secretary of the King, Podskarbi of Duchy of Prussia since 1555, castellan of Gdańsk in 1556–1574, voivode of Sandomierz Voivodeship since 1574, and president of the Komisja Morska (Sea Commission). He advocated for a union of Royal Prussia with the Crown.

In 1574 and 1575, he was proposed as candidate for King of Poland (see [1]).