Countess Izabela Poniatowska (1730 – 1808/1813) was a Polish noblewoman (szlachcianka). 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 August.
She married, firstly on November 19, 1748 as his third wife Hetman Count Jan Klemens (Jan Kazimierz) Branicki in 1756, and secondly, Andrzej Mokronowski, wojewoda mazowiecki, without issue.
| Persondata | |
|---|---|
| Name | Poniatowska, Izabella |
| Alternative names | |
| Short description | |
| Date of birth | 1730 |
| Place of birth | unknown |
| Date of death | 1801 |
| Place of death | Białystok |
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