Whakakihia te rerenga e whai ake nei: I whanau a Lorentowicz i Pabianice, i te pokapū o Polani o naianei, i te tau 1868, e rima tau i muri i te whakatuwheratanga o te
Polish 1863 Uprising that was eventually suppressed by the Russian Imperial Army. Ko te whakaekenga o Poari i te tau 1863 i tukinotia e te ope taua a Ruhia. I neke ona maatua ki te pokapū o Polani o naianei mai i nga rohe tuawhenua o te rawhiti o "Kresy", i mawhiti i te rawakore me te tukino. I whiwhi a Jan i tana tohu kura tuarua i Płock ma te kura kaainga ka haere wawe ia ki Parani, i noho ai ia tae noa ki te 1903 ka ako i te Sorbonne.