Registered Cossacks
Michał Wiśniowiecki or Mykhailo Vyshnevetsky (1529–1584) was a Ruthenian noble (szlachcic) of Polish–Lithuanian Commonwealth . He was a prince at Wiśniowiec, magnate, Senior of Registered Cossacks, Hetman of Zaporozhian Cossacks, castellan of Bracław and Kijów (Kyiv or Kiev), starost of Czerkasy, Kaniów, Lubeka and Łojów. Great-grandfather of the future King of Poland, Michał Korybut Wiśniowiecki.