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Son of Waclaw Leszczynski and Konstancja Joanna Leszczyńska Husband of Konstancja Leszczyńska Brother of Magdalena Gruszczyńska and Casimir - Kazimierz Ignatz - Ignacy Leszczynski Half brother of Theophila Taide Lesh'chinska and Wiktoria Potocka
https://pl.wikipedia.org/wiki/Stefan_Leszczy%C5%84ski