Marceli and Aleksandra Tarczewscy had twelve children (of whom more than half died in childhood or early youth): Ignacy Juliusz (1818–1819), Władysław Wojciech Jozafat (born 1819), Helena Katarzyna (1820–1845), the wife of Aleksander Radwan, real state councilor; Kazimierz Maciej (1822–1872), an official of the Bank of Poland; Gustaw Jan (1822 – after 1864), a staff cavalry master of the Russian army who was the organizer of the uprising in Biała Podlaska, for which he was sent to exile; Maria Stefania (born in 1823), married to Józef Konstanty Grodzicki; Marcjana Stanisław Jana de Matha (born 1825); Ignacy Onufry Antoni (1826–1829); Maria Regina (1826–1827); Maria Klementyna (1828–1828); Aleksandra Wincent (1830–1836) and Adam Jan Hieronim (1832–1833). Marceli Tarczewski also brought up his younger stepbrother, Jan Kraszewski.