Background
He was the son of Marianna Kazanowska and Stanisław January Jabłonowski.
He was the son of Marianna Kazanowska and Stanisław January Jabłonowski.
He also held the positions of Crown standard-holder from 1687, voivode-governor of Volhynia since 1693, and also voivode-governor of Ruthenia from 1697. Through them he was the brother of Aleksander, Stanisław, Jadwiga, and Anna. Through Anna, he was the uncle of King Stanisław Leszczyński and grand-uncle of Queen Maria Leszczyńska.
After Augustus was dethroned, he was suggested as a possible candidate, but never put himself forward.
As part of the Northern Wars, Stanisław I Leszczyński was already supported by Karl XII. On his behalf, in 1713, he sought to dethrone Augustus, for which he was arrested on 7 August and released in 1717 by the Silent Sejm. He was an avid art patron, responsible for bringing Augustyn Mirys to the country.
He is portrayed in the novel Za Sasów of Józef Ignacy Kraszewski as a philosopher concerned for the fate of his country.
