Izabella Poniatowska
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Izabella Poniatowska | |
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| Born | 1 July 1730 Wołczyn, Habsburg Austria |
| Died | 14 February 1808 (aged 77) Białystok, Congress Poland |
| Noble family | Poniatowski |
| Spouse(s) | Jan Klemens Branicki Andrzej Mokronowski |
| Issue | none |
| Father | Stanisław Poniatowski |
| Mother | Konstancja Czartoryska |
Countess Izabella Poniatowska (1 July 1730 – 14 February 1808) was a Polish noblewoman, countess and princess. She was a sister of Stanisław Antoni Poniatowski, who in 1764 became King of Poland and Grand Duke of Lithuania, and reigned as Stanisław II Augustus.
She married, firstly on November 19, 1748 as his third wife Hetman Jan Klemens Branicki in 1756, and secondly the Masovian voivode Andrzej Mokronowski, without issue.
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