It was to Ostrowsko, to his grandmother's home, that Banach was taken after his baptism. However, when Banach's grandmother took ill, Stefan Greczek arranged for his son to be brought up by Franciszka Plowa who lived in Kraków with her daughter Maria.
Ito ay upang Ostrowsko, sa kanyang lola's home, na Banach kinuha pagkatapos ng kanyang binyag. Gayunman, kapag Banach's lola took masama, Stefan Greczek inayos para sa kanyang anak na nagdala sa pamamagitan ng Franciszka Plowa na nanirahan sa Krakow sa kanyang anak na babae Maria.