Izabella Poniatowska Born 1 July 1730 Wołczyn, Habsburg Austria Died 14 February 1808(1808-02-14) (aged 77) Białystok, Congress Poland Noble family Poniatowski Spouse(s) Jan Klemens Branicki Andrzej Mokronowski Issue none Father Stanisław Poniatowski Mother Konstancja Czartoryska