However, in the times of Adam Kisiel, most of the Ruthenian nobility was almost completely Polonized.

[15] His grandfather, Gniewosz Kisiel, was a colonel in the service of the Polish king Sigismund I the Old, and lost his life in the battle of Orsza.

[8] Adam's brother was Mikołaj Kisiel (d. 1651), a chorąży of Nowogród Siewierski.

After Tadeusz Jan Lubomirski in 1905 published his work Adam Kisiel wojewoda kijowski, where is contained information that on the grave inscription of Adam Kisiel is mentioned that he died as 53 years old, historians stated that he was born in 1600.

[16] Kisiel persuaded king Władysław IV Vasa to reinstate the Orthodox hierarchy and he acted as an intermediary between the Royal Court, General Sejm, and Cossacks.

[citation needed] During the Khmelnytsky Uprising he was one of the most prominent members of the negotiations and pro-Cossack factions among the szlachta.