Hetman Stefan Czarniecki

Hetman Stefan Czarniecki is initially a Vassal of Polish Commonwealth.

Wikipedia has an article on this subject at:
Stefan Czarniecki

Polish Commonwealth
Monarch:	Claimant:
King Jan Kasimir	Janusz Radziwill
Vassals:
Alexander Casimir Wolowicz • Alexander Oginsky • Andrzej Kmicic • Boguslav Nesvizhsky • Casimir Tyszkiewicz Fyodor Obukhovich • Jan Skrzetuski • Jan Sobieski • Jan Zamojski • Jan Zenowicz Janusz Kiszka • Jerzy Halecki • Krzysztof Grzymultowski • Michal Vishnevetsky • Michal Wolodyjowski Pavel Sapega • Siegmund Slushka • Stanislav Liantskoronsky • Stanislaw Potocki • Stefan Czarniecki