Stanisław II August, known also by his regnal Latin name Stanislaus II Augustus, and as Stanisław August Poniatowski, was King of Poland and Grand Duke of Lithuania from 1764 to 1795, and the last monarch of the Polish–Lithuanian Commonwealth. Wikipedia
Born: January 17, 1732, Voŭčyn, Belarus
Died: February 12, 1798 (age 66 years), Saint Petersburg, Russia
Children: Stanisław Grabowski, Konstancja Żwanowa, Michał Grabowski, and more
Spouse: Elżbieta Szydłowska
Parents: Stanisław Poniatowski and Konstancja Czartoryska
Grandchildren: Kazimierz Żwan and Ludwik Grabowski